Class: Google::Cloud::DiscoveryEngine::V1::SearchResponse

Inherits:

Object

• Object
• Google::Cloud::DiscoveryEngine::V1::SearchResponse

Extended by:

Protobuf::MessageExts::ClassMethods

Includes:

Protobuf::MessageExts

Defined in:

proto_docs/google/cloud/discoveryengine/v1/search_service.rb

Overview

Response message for SearchService.Search method.

Defined Under Namespace

Modules: SemanticState Classes: Facet, NaturalLanguageQueryUnderstandingInfo, QueryExpansionInfo, SearchResult, SessionInfo, Summary

Instance Attribute Summary

• #attribution_token ⇒ ::String

  A unique search token.

• #corrected_query ⇒ ::String

  Contains the spell corrected query, if found.

• #facets ⇒ ::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Facet>

  Results of facets requested by user.

• #natural_language_query_understanding_info ⇒ ::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo readonly

  Output only.

• #next_page_token ⇒ ::String

  A token that can be sent as SearchRequest.page_token to retrieve the next page.

• #query_expansion_info ⇒ ::Google::Cloud::DiscoveryEngine::V1::SearchResponse::QueryExpansionInfo

  Query expansion information for the returned results.

• #redirect_uri ⇒ ::String

  The URI of a customer-defined redirect page.

• #results ⇒ ::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult>

  A list of matched documents.

• #search_link_promotions ⇒ ::Array<::Google::Cloud::DiscoveryEngine::V1::SearchLinkPromotion>

  Promotions for site search.

• #semantic_state ⇒ ::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SemanticState readonly

  Output only.

• #session_info ⇒ ::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SessionInfo

  Session information.

• #summary ⇒ ::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary

  A summary as part of the search results.

• #total_size ⇒ ::Integer

  The estimated total count of matched items irrespective of pagination.

Instance Attribute Details

#attribution_token ⇒ ::String

Returns A unique search token. This should be included in the UserEvent logs resulting from this search, which enables accurate attribution of search model performance. This also helps to identify a request during the customer support scenarios.

Returns:

• (::String) —

  A unique search token. This should be included in the UserEvent logs resulting from this search, which enables accurate attribution of search model performance. This also helps to identify a request during the customer support scenarios.

# File 'proto_docs/google/cloud/discoveryengine/v1/search_service.rb', line 1419

class SearchResponse
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # Represents the search results.
  # @!attribute [rw] id
  #   @return [::String]
  #     {::Google::Cloud::DiscoveryEngine::V1::Document#id Document.id} of the
  #     searched {::Google::Cloud::DiscoveryEngine::V1::Document Document}.
  # @!attribute [rw] document
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Document]
  #     The document data snippet in the search response. Only fields that are
  #     marked as `retrievable` are populated.
  # @!attribute [rw] chunk
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Chunk]
  #     The chunk data in the search response if the
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec#search_result_mode SearchRequest.ContentSearchSpec.search_result_mode}
  #     is set to
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SearchResultMode::CHUNKS CHUNKS}.
  # @!attribute [r] model_scores
  #   @return [::Google::Protobuf::Map{::String => ::Google::Cloud::DiscoveryEngine::V1::DoubleList}]
  #     Output only. Google provided available scores.
  # @!attribute [rw] rank_signals
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals]
  #     Optional. A set of ranking signals associated with the result.
  class SearchResult
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A set of ranking signals.
    # @!attribute [rw] keyword_similarity_score
    #   @return [::Float]
    #     Optional. Keyword matching adjustment.
    # @!attribute [rw] relevance_score
    #   @return [::Float]
    #     Optional. Semantic relevance adjustment.
    # @!attribute [rw] semantic_similarity_score
    #   @return [::Float]
    #     Optional. Semantic similarity adjustment.
    # @!attribute [rw] pctr_rank
    #   @return [::Float]
    #     Optional. Predicted conversion rate adjustment as a rank.
    # @!attribute [rw] topicality_rank
    #   @return [::Float]
    #     Optional. Topicality adjustment as a rank.
    # @!attribute [rw] document_age
    #   @return [::Float]
    #     Optional. Age of the document in hours.
    # @!attribute [rw] boosting_factor
    #   @return [::Float]
    #     Optional. Combined custom boosts for a doc.
    # @!attribute [rw] default_rank
    #   @return [::Float]
    #     Optional. The default rank of the result.
    # @!attribute [rw] custom_signals
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals::CustomSignal>]
    #     Optional. A list of custom clearbox signals.
    class RankSignals
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Custom clearbox signal represented by name and value pair.
      # @!attribute [rw] name
      #   @return [::String]
      #     Optional. Name of the signal.
      # @!attribute [rw] value
      #   @return [::Float]
      #     Optional. Float value representing the ranking signal (e.g. 1.25 for
      #     BM25).
      class CustomSignal
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # @!attribute [rw] key
    #   @return [::String]
    # @!attribute [rw] value
    #   @return [::Google::Cloud::DiscoveryEngine::V1::DoubleList]
    class ModelScoresEntry
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # A facet result.
  # @!attribute [rw] key
  #   @return [::String]
  #     The key for this facet. For example, `"colors"` or `"price"`. It matches
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#key SearchRequest.FacetSpec.FacetKey.key}.
  # @!attribute [rw] values
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Facet::FacetValue>]
  #     The facet values for this field.
  # @!attribute [rw] dynamic_facet
  #   @return [::Boolean]
  #     Whether the facet is dynamically generated.
  class Facet
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A facet value which contains value names and their count.
    # @!attribute [rw] value
    #   @return [::String]
    #     Text value of a facet, such as "Black" for facet "colors".
    #
    #     Note: The following fields are mutually exclusive: `value`, `interval`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] interval
    #   @return [::Google::Cloud::DiscoveryEngine::V1::Interval]
    #     Interval value for a facet, such as [10, 20) for facet "price". It
    #     matches
    #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#intervals SearchRequest.FacetSpec.FacetKey.intervals}.
    #
    #     Note: The following fields are mutually exclusive: `interval`, `value`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] count
    #   @return [::Integer]
    #     Number of items that have this facet value.
    class FacetValue
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # Summary of the top N search results specified by the summary spec.
  # @!attribute [rw] summary_text
  #   @return [::String]
  #     The summary content.
  # @!attribute [rw] summary_skipped_reasons
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummarySkippedReason>]
  #     Additional summary-skipped reasons. This provides the reason for ignored
  #     cases. If nothing is skipped, this field is not set.
  # @!attribute [rw] safety_attributes
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SafetyAttributes]
  #     A collection of Safety Attribute categories and their associated
  #     confidence scores.
  # @!attribute [rw] summary_with_metadata
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummaryWithMetadata]
  #     Summary with metadata information.
  class Summary
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # Safety Attribute categories and their associated confidence scores.
    # @!attribute [rw] categories
    #   @return [::Array<::String>]
    #     The display names of Safety Attribute categories associated with the
    #     generated content. Order matches the Scores.
    # @!attribute [rw] scores
    #   @return [::Array<::Float>]
    #     The confidence scores of the each category, higher
    #     value means higher confidence. Order matches the Categories.
    class SafetyAttributes
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation metadata.
    # @!attribute [rw] citations
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Citation>]
    #     Citations for segments.
    class CitationMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation info for a segment.
    # @!attribute [rw] start_index
    #   @return [::Integer]
    #     Index indicates the start of the segment, measured in bytes/unicode.
    # @!attribute [rw] end_index
    #   @return [::Integer]
    #     End of the attributed segment, exclusive.
    # @!attribute [rw] sources
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationSource>]
    #     Citation sources for the attributed segment.
    class Citation
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation source.
    # @!attribute [rw] reference_index
    #   @return [::Integer]
    #     Document reference index from SummaryWithMetadata.references.
    #     It is 0-indexed and the value will be zero if the reference_index is
    #     not set explicitly.
    class CitationSource
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Document reference.
    # @!attribute [rw] title
    #   @return [::String]
    #     Title of the document.
    # @!attribute [rw] document
    #   @return [::String]
    #     Required.
    #     {::Google::Cloud::DiscoveryEngine::V1::Document#name Document.name} of the
    #     document. Full resource name of the referenced document, in the format
    #     `projects/*/locations/*/collections/*/dataStores/*/branches/*/documents/*`.
    # @!attribute [rw] uri
    #   @return [::String]
    #     Cloud Storage or HTTP uri for the document.
    # @!attribute [rw] chunk_contents
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference::ChunkContent>]
    #     List of cited chunk contents derived from document content.
    class Reference
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Chunk content.
      # @!attribute [rw] content
      #   @return [::String]
      #     Chunk textual content.
      # @!attribute [rw] page_identifier
      #   @return [::String]
      #     Page identifier.
      class ChunkContent
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # Summary with metadata information.
    # @!attribute [rw] summary
    #   @return [::String]
    #     Summary text with no citation information.
    # @!attribute [rw] citation_metadata
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationMetadata]
    #     Citation metadata for given summary.
    # @!attribute [rw] references
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference>]
    #     Document References.
    class SummaryWithMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # An Enum for summary-skipped reasons.
    module SummarySkippedReason
      # Default value. The summary skipped reason is not specified.
      SUMMARY_SKIPPED_REASON_UNSPECIFIED = 0

      # The adversarial query ignored case.
      #
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_adversarial_query SummarySpec.ignore_adversarial_query}
      # is set to `true`.
      ADVERSARIAL_QUERY_IGNORED = 1

      # The non-summary seeking query ignored case.
      #
      # Google skips the summary if the query is chit chat.
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_non_summary_seeking_query SummarySpec.ignore_non_summary_seeking_query}
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED = 2

      # The out-of-domain query ignored case.
      #
      # Google skips the summary if there are no high-relevance search results.
      # For example, the data store contains facts about company A but the
      # user query is asking questions about company B.
      OUT_OF_DOMAIN_QUERY_IGNORED = 3

      # The potential policy violation case.
      #
      # Google skips the summary if there is a potential policy violation
      # detected. This includes content that may be violent or toxic.
      POTENTIAL_POLICY_VIOLATION = 4

      # The LLM addon not enabled case.
      #
      # Google skips the summary if the LLM addon is not enabled.
      LLM_ADDON_NOT_ENABLED = 5

      # The no relevant content case.
      #
      # Google skips the summary if there is no relevant content in the
      # retrieved search results.
      NO_RELEVANT_CONTENT = 6

      # The jail-breaking query ignored case.
      #
      # For example, "Reply in the tone of a competing company's CEO".
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_jail_breaking_query]
      # is set to `true`.
      JAIL_BREAKING_QUERY_IGNORED = 7

      # The customer policy violation case.
      #
      # Google skips the summary if there is a customer policy violation
      # detected. The policy is defined by the customer.
      CUSTOMER_POLICY_VIOLATION = 8

      # The non-answer seeking query ignored case.
      #
      # Google skips the summary if the query doesn't have clear intent.
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_non_answer_seeking_query]
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED_V2 = 9

      # The time out case.
      #
      # Google skips the summary if the time out.
      TIME_OUT = 10
    end
  end

  # Information describing query expansion including whether expansion has
  # occurred.
  # @!attribute [rw] expanded_query
  #   @return [::Boolean]
  #     Bool describing whether query expansion has occurred.
  # @!attribute [rw] pinned_result_count
  #   @return [::Integer]
  #     Number of pinned results. This field will only be set when expansion
  #     happens and
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::QueryExpansionSpec#pin_unexpanded_results SearchRequest.QueryExpansionSpec.pin_unexpanded_results}
  #     is set to true.
  class QueryExpansionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Information describing what natural language understanding was
  # done on the input query.
  # @!attribute [rw] extracted_filters
  #   @return [::String]
  #     The filters that were extracted from the input query.
  # @!attribute [rw] rewritten_query
  #   @return [::String]
  #     Rewritten input query minus the extracted filters.
  # @!attribute [rw] classified_intents
  #   @return [::Array<::String>]
  #     The classified intents from the input query.
  # @!attribute [rw] structured_extracted_filter
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter]
  #     The filters that were extracted from the input query represented in a
  #     structured form.
  class NaturalLanguageQueryUnderstandingInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # The filters that were extracted from the input query represented in a
    # structured form.
    # @!attribute [rw] expression
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression]
    #     The expression denoting the filter that was extracted from the input
    #     query in a structured form. It can be a simple expression denoting a
    #     single string, numerical or geolocation constraint or a compound
    #     expression which is a combination of multiple expressions connected
    #     using logical (OR and AND) operators.
    class StructuredExtractedFilter
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Constraint expression of a string field.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the string field as defined in the schema.
      # @!attribute [rw] values
      #   @return [::Array<::String>]
      #     Values of the string field. The record will only be returned if the
      #     field value matches one of the values specified here.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class StringConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Constraint expression of a number field. Example: price < 100.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the numerical field as defined in the schema.
      # @!attribute [rw] comparison
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint::Comparison]
      #     The comparison operation performed between the field value and the
      #     value specified in the constraint.
      # @!attribute [rw] value
      #   @return [::Float]
      #     The value specified in the numerical constraint.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class NumberConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods

        # The comparison operation that was performed.
        module Comparison
          # Undefined comparison operator.
          COMPARISON_UNSPECIFIED = 0

          # Denotes equality `=` operator.
          EQUALS = 1

          # Denotes less than or equal to `<=` operator.
          LESS_THAN_EQUALS = 2

          # Denotes less than `<` operator.
          LESS_THAN = 3

          # Denotes greater than or equal to `>=` operator.
          GREATER_THAN_EQUALS = 4

          # Denotes greater than `>` operator.
          GREATER_THAN = 5
        end
      end

      # Constraint of a geolocation field.
      # Name of the geolocation field as defined in the schema.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     The name of the geolocation field as defined in the schema.
      # @!attribute [rw] address
      #   @return [::String]
      #     The reference address that was inferred from the input query. The
      #     proximity of the reference address to the geolocation field will be
      #     used to filter the results.
      # @!attribute [rw] latitude
      #   @return [::Float]
      #     The latitude of the geolocation inferred from the input query.
      # @!attribute [rw] longitude
      #   @return [::Float]
      #     The longitude of the geolocation inferred from the input query.
      # @!attribute [rw] radius_in_meters
      #   @return [::Float]
      #     The radius in meters around the address. The record is returned if
      #     the location of the geolocation field is within the radius.
      class GeolocationConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `And` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ANDed together.
      class AndExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `Or` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ORed together.
      class OrExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # The expression denoting the filter that was extracted from the input
      # query.
      # @!attribute [rw] string_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::StringConstraint]
      #     String constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] number_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint]
      #     Numerical constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `number_constraint`, `string_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] geolocation_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::GeolocationConstraint]
      #     Geolocation constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `geolocation_constraint`, `string_constraint`, `number_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] and_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::AndExpression]
      #     Logical "And" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `and_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] or_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::OrExpression]
      #     Logical "Or" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `or_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      class Expression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end
  end

  # Information about the session.
  # @!attribute [rw] name
  #   @return [::String]
  #     Name of the session.
  #     If the auto-session mode is used (when
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest#session SearchRequest.session}
  #     ends with "-"), this field holds the newly generated session name.
  # @!attribute [rw] query_id
  #   @return [::String]
  #     Query ID that corresponds to this search API call.
  #     One session can have multiple turns, each with a unique query ID.
  #
  #     By specifying the session name and this query ID in the Answer API call,
  #     the answer generation happens in the context of the search results from
  #     this search call.
  class SessionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Semantic state of the search response.
  module SemanticState
    # Default value. Should not be used.
    SEMANTIC_STATE_UNSPECIFIED = 0

    # Semantic search was disabled for this search response.
    DISABLED = 1

    # Semantic search was enabled for this search response.
    ENABLED = 2
  end
end

#corrected_query ⇒ ::String

Returns Contains the spell corrected query, if found. If the spell correction type is AUTOMATIC, then the search results are based on corrected_query. Otherwise the original query is used for search.

Returns:

• (::String) —

  Contains the spell corrected query, if found. If the spell correction type is AUTOMATIC, then the search results are based on corrected_query. Otherwise the original query is used for search.

# File 'proto_docs/google/cloud/discoveryengine/v1/search_service.rb', line 1419

class SearchResponse
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # Represents the search results.
  # @!attribute [rw] id
  #   @return [::String]
  #     {::Google::Cloud::DiscoveryEngine::V1::Document#id Document.id} of the
  #     searched {::Google::Cloud::DiscoveryEngine::V1::Document Document}.
  # @!attribute [rw] document
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Document]
  #     The document data snippet in the search response. Only fields that are
  #     marked as `retrievable` are populated.
  # @!attribute [rw] chunk
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Chunk]
  #     The chunk data in the search response if the
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec#search_result_mode SearchRequest.ContentSearchSpec.search_result_mode}
  #     is set to
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SearchResultMode::CHUNKS CHUNKS}.
  # @!attribute [r] model_scores
  #   @return [::Google::Protobuf::Map{::String => ::Google::Cloud::DiscoveryEngine::V1::DoubleList}]
  #     Output only. Google provided available scores.
  # @!attribute [rw] rank_signals
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals]
  #     Optional. A set of ranking signals associated with the result.
  class SearchResult
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A set of ranking signals.
    # @!attribute [rw] keyword_similarity_score
    #   @return [::Float]
    #     Optional. Keyword matching adjustment.
    # @!attribute [rw] relevance_score
    #   @return [::Float]
    #     Optional. Semantic relevance adjustment.
    # @!attribute [rw] semantic_similarity_score
    #   @return [::Float]
    #     Optional. Semantic similarity adjustment.
    # @!attribute [rw] pctr_rank
    #   @return [::Float]
    #     Optional. Predicted conversion rate adjustment as a rank.
    # @!attribute [rw] topicality_rank
    #   @return [::Float]
    #     Optional. Topicality adjustment as a rank.
    # @!attribute [rw] document_age
    #   @return [::Float]
    #     Optional. Age of the document in hours.
    # @!attribute [rw] boosting_factor
    #   @return [::Float]
    #     Optional. Combined custom boosts for a doc.
    # @!attribute [rw] default_rank
    #   @return [::Float]
    #     Optional. The default rank of the result.
    # @!attribute [rw] custom_signals
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals::CustomSignal>]
    #     Optional. A list of custom clearbox signals.
    class RankSignals
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Custom clearbox signal represented by name and value pair.
      # @!attribute [rw] name
      #   @return [::String]
      #     Optional. Name of the signal.
      # @!attribute [rw] value
      #   @return [::Float]
      #     Optional. Float value representing the ranking signal (e.g. 1.25 for
      #     BM25).
      class CustomSignal
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # @!attribute [rw] key
    #   @return [::String]
    # @!attribute [rw] value
    #   @return [::Google::Cloud::DiscoveryEngine::V1::DoubleList]
    class ModelScoresEntry
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # A facet result.
  # @!attribute [rw] key
  #   @return [::String]
  #     The key for this facet. For example, `"colors"` or `"price"`. It matches
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#key SearchRequest.FacetSpec.FacetKey.key}.
  # @!attribute [rw] values
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Facet::FacetValue>]
  #     The facet values for this field.
  # @!attribute [rw] dynamic_facet
  #   @return [::Boolean]
  #     Whether the facet is dynamically generated.
  class Facet
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A facet value which contains value names and their count.
    # @!attribute [rw] value
    #   @return [::String]
    #     Text value of a facet, such as "Black" for facet "colors".
    #
    #     Note: The following fields are mutually exclusive: `value`, `interval`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] interval
    #   @return [::Google::Cloud::DiscoveryEngine::V1::Interval]
    #     Interval value for a facet, such as [10, 20) for facet "price". It
    #     matches
    #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#intervals SearchRequest.FacetSpec.FacetKey.intervals}.
    #
    #     Note: The following fields are mutually exclusive: `interval`, `value`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] count
    #   @return [::Integer]
    #     Number of items that have this facet value.
    class FacetValue
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # Summary of the top N search results specified by the summary spec.
  # @!attribute [rw] summary_text
  #   @return [::String]
  #     The summary content.
  # @!attribute [rw] summary_skipped_reasons
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummarySkippedReason>]
  #     Additional summary-skipped reasons. This provides the reason for ignored
  #     cases. If nothing is skipped, this field is not set.
  # @!attribute [rw] safety_attributes
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SafetyAttributes]
  #     A collection of Safety Attribute categories and their associated
  #     confidence scores.
  # @!attribute [rw] summary_with_metadata
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummaryWithMetadata]
  #     Summary with metadata information.
  class Summary
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # Safety Attribute categories and their associated confidence scores.
    # @!attribute [rw] categories
    #   @return [::Array<::String>]
    #     The display names of Safety Attribute categories associated with the
    #     generated content. Order matches the Scores.
    # @!attribute [rw] scores
    #   @return [::Array<::Float>]
    #     The confidence scores of the each category, higher
    #     value means higher confidence. Order matches the Categories.
    class SafetyAttributes
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation metadata.
    # @!attribute [rw] citations
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Citation>]
    #     Citations for segments.
    class CitationMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation info for a segment.
    # @!attribute [rw] start_index
    #   @return [::Integer]
    #     Index indicates the start of the segment, measured in bytes/unicode.
    # @!attribute [rw] end_index
    #   @return [::Integer]
    #     End of the attributed segment, exclusive.
    # @!attribute [rw] sources
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationSource>]
    #     Citation sources for the attributed segment.
    class Citation
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation source.
    # @!attribute [rw] reference_index
    #   @return [::Integer]
    #     Document reference index from SummaryWithMetadata.references.
    #     It is 0-indexed and the value will be zero if the reference_index is
    #     not set explicitly.
    class CitationSource
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Document reference.
    # @!attribute [rw] title
    #   @return [::String]
    #     Title of the document.
    # @!attribute [rw] document
    #   @return [::String]
    #     Required.
    #     {::Google::Cloud::DiscoveryEngine::V1::Document#name Document.name} of the
    #     document. Full resource name of the referenced document, in the format
    #     `projects/*/locations/*/collections/*/dataStores/*/branches/*/documents/*`.
    # @!attribute [rw] uri
    #   @return [::String]
    #     Cloud Storage or HTTP uri for the document.
    # @!attribute [rw] chunk_contents
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference::ChunkContent>]
    #     List of cited chunk contents derived from document content.
    class Reference
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Chunk content.
      # @!attribute [rw] content
      #   @return [::String]
      #     Chunk textual content.
      # @!attribute [rw] page_identifier
      #   @return [::String]
      #     Page identifier.
      class ChunkContent
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # Summary with metadata information.
    # @!attribute [rw] summary
    #   @return [::String]
    #     Summary text with no citation information.
    # @!attribute [rw] citation_metadata
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationMetadata]
    #     Citation metadata for given summary.
    # @!attribute [rw] references
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference>]
    #     Document References.
    class SummaryWithMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # An Enum for summary-skipped reasons.
    module SummarySkippedReason
      # Default value. The summary skipped reason is not specified.
      SUMMARY_SKIPPED_REASON_UNSPECIFIED = 0

      # The adversarial query ignored case.
      #
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_adversarial_query SummarySpec.ignore_adversarial_query}
      # is set to `true`.
      ADVERSARIAL_QUERY_IGNORED = 1

      # The non-summary seeking query ignored case.
      #
      # Google skips the summary if the query is chit chat.
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_non_summary_seeking_query SummarySpec.ignore_non_summary_seeking_query}
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED = 2

      # The out-of-domain query ignored case.
      #
      # Google skips the summary if there are no high-relevance search results.
      # For example, the data store contains facts about company A but the
      # user query is asking questions about company B.
      OUT_OF_DOMAIN_QUERY_IGNORED = 3

      # The potential policy violation case.
      #
      # Google skips the summary if there is a potential policy violation
      # detected. This includes content that may be violent or toxic.
      POTENTIAL_POLICY_VIOLATION = 4

      # The LLM addon not enabled case.
      #
      # Google skips the summary if the LLM addon is not enabled.
      LLM_ADDON_NOT_ENABLED = 5

      # The no relevant content case.
      #
      # Google skips the summary if there is no relevant content in the
      # retrieved search results.
      NO_RELEVANT_CONTENT = 6

      # The jail-breaking query ignored case.
      #
      # For example, "Reply in the tone of a competing company's CEO".
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_jail_breaking_query]
      # is set to `true`.
      JAIL_BREAKING_QUERY_IGNORED = 7

      # The customer policy violation case.
      #
      # Google skips the summary if there is a customer policy violation
      # detected. The policy is defined by the customer.
      CUSTOMER_POLICY_VIOLATION = 8

      # The non-answer seeking query ignored case.
      #
      # Google skips the summary if the query doesn't have clear intent.
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_non_answer_seeking_query]
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED_V2 = 9

      # The time out case.
      #
      # Google skips the summary if the time out.
      TIME_OUT = 10
    end
  end

  # Information describing query expansion including whether expansion has
  # occurred.
  # @!attribute [rw] expanded_query
  #   @return [::Boolean]
  #     Bool describing whether query expansion has occurred.
  # @!attribute [rw] pinned_result_count
  #   @return [::Integer]
  #     Number of pinned results. This field will only be set when expansion
  #     happens and
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::QueryExpansionSpec#pin_unexpanded_results SearchRequest.QueryExpansionSpec.pin_unexpanded_results}
  #     is set to true.
  class QueryExpansionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Information describing what natural language understanding was
  # done on the input query.
  # @!attribute [rw] extracted_filters
  #   @return [::String]
  #     The filters that were extracted from the input query.
  # @!attribute [rw] rewritten_query
  #   @return [::String]
  #     Rewritten input query minus the extracted filters.
  # @!attribute [rw] classified_intents
  #   @return [::Array<::String>]
  #     The classified intents from the input query.
  # @!attribute [rw] structured_extracted_filter
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter]
  #     The filters that were extracted from the input query represented in a
  #     structured form.
  class NaturalLanguageQueryUnderstandingInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # The filters that were extracted from the input query represented in a
    # structured form.
    # @!attribute [rw] expression
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression]
    #     The expression denoting the filter that was extracted from the input
    #     query in a structured form. It can be a simple expression denoting a
    #     single string, numerical or geolocation constraint or a compound
    #     expression which is a combination of multiple expressions connected
    #     using logical (OR and AND) operators.
    class StructuredExtractedFilter
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Constraint expression of a string field.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the string field as defined in the schema.
      # @!attribute [rw] values
      #   @return [::Array<::String>]
      #     Values of the string field. The record will only be returned if the
      #     field value matches one of the values specified here.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class StringConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Constraint expression of a number field. Example: price < 100.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the numerical field as defined in the schema.
      # @!attribute [rw] comparison
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint::Comparison]
      #     The comparison operation performed between the field value and the
      #     value specified in the constraint.
      # @!attribute [rw] value
      #   @return [::Float]
      #     The value specified in the numerical constraint.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class NumberConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods

        # The comparison operation that was performed.
        module Comparison
          # Undefined comparison operator.
          COMPARISON_UNSPECIFIED = 0

          # Denotes equality `=` operator.
          EQUALS = 1

          # Denotes less than or equal to `<=` operator.
          LESS_THAN_EQUALS = 2

          # Denotes less than `<` operator.
          LESS_THAN = 3

          # Denotes greater than or equal to `>=` operator.
          GREATER_THAN_EQUALS = 4

          # Denotes greater than `>` operator.
          GREATER_THAN = 5
        end
      end

      # Constraint of a geolocation field.
      # Name of the geolocation field as defined in the schema.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     The name of the geolocation field as defined in the schema.
      # @!attribute [rw] address
      #   @return [::String]
      #     The reference address that was inferred from the input query. The
      #     proximity of the reference address to the geolocation field will be
      #     used to filter the results.
      # @!attribute [rw] latitude
      #   @return [::Float]
      #     The latitude of the geolocation inferred from the input query.
      # @!attribute [rw] longitude
      #   @return [::Float]
      #     The longitude of the geolocation inferred from the input query.
      # @!attribute [rw] radius_in_meters
      #   @return [::Float]
      #     The radius in meters around the address. The record is returned if
      #     the location of the geolocation field is within the radius.
      class GeolocationConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `And` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ANDed together.
      class AndExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `Or` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ORed together.
      class OrExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # The expression denoting the filter that was extracted from the input
      # query.
      # @!attribute [rw] string_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::StringConstraint]
      #     String constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] number_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint]
      #     Numerical constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `number_constraint`, `string_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] geolocation_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::GeolocationConstraint]
      #     Geolocation constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `geolocation_constraint`, `string_constraint`, `number_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] and_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::AndExpression]
      #     Logical "And" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `and_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] or_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::OrExpression]
      #     Logical "Or" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `or_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      class Expression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end
  end

  # Information about the session.
  # @!attribute [rw] name
  #   @return [::String]
  #     Name of the session.
  #     If the auto-session mode is used (when
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest#session SearchRequest.session}
  #     ends with "-"), this field holds the newly generated session name.
  # @!attribute [rw] query_id
  #   @return [::String]
  #     Query ID that corresponds to this search API call.
  #     One session can have multiple turns, each with a unique query ID.
  #
  #     By specifying the session name and this query ID in the Answer API call,
  #     the answer generation happens in the context of the search results from
  #     this search call.
  class SessionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Semantic state of the search response.
  module SemanticState
    # Default value. Should not be used.
    SEMANTIC_STATE_UNSPECIFIED = 0

    # Semantic search was disabled for this search response.
    DISABLED = 1

    # Semantic search was enabled for this search response.
    ENABLED = 2
  end
end

#facets ⇒ ::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Facet>

Returns Results of facets requested by user.

Returns:

• (::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Facet>) —

  Results of facets requested by user.

# File 'proto_docs/google/cloud/discoveryengine/v1/search_service.rb', line 1419

class SearchResponse
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # Represents the search results.
  # @!attribute [rw] id
  #   @return [::String]
  #     {::Google::Cloud::DiscoveryEngine::V1::Document#id Document.id} of the
  #     searched {::Google::Cloud::DiscoveryEngine::V1::Document Document}.
  # @!attribute [rw] document
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Document]
  #     The document data snippet in the search response. Only fields that are
  #     marked as `retrievable` are populated.
  # @!attribute [rw] chunk
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Chunk]
  #     The chunk data in the search response if the
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec#search_result_mode SearchRequest.ContentSearchSpec.search_result_mode}
  #     is set to
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SearchResultMode::CHUNKS CHUNKS}.
  # @!attribute [r] model_scores
  #   @return [::Google::Protobuf::Map{::String => ::Google::Cloud::DiscoveryEngine::V1::DoubleList}]
  #     Output only. Google provided available scores.
  # @!attribute [rw] rank_signals
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals]
  #     Optional. A set of ranking signals associated with the result.
  class SearchResult
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A set of ranking signals.
    # @!attribute [rw] keyword_similarity_score
    #   @return [::Float]
    #     Optional. Keyword matching adjustment.
    # @!attribute [rw] relevance_score
    #   @return [::Float]
    #     Optional. Semantic relevance adjustment.
    # @!attribute [rw] semantic_similarity_score
    #   @return [::Float]
    #     Optional. Semantic similarity adjustment.
    # @!attribute [rw] pctr_rank
    #   @return [::Float]
    #     Optional. Predicted conversion rate adjustment as a rank.
    # @!attribute [rw] topicality_rank
    #   @return [::Float]
    #     Optional. Topicality adjustment as a rank.
    # @!attribute [rw] document_age
    #   @return [::Float]
    #     Optional. Age of the document in hours.
    # @!attribute [rw] boosting_factor
    #   @return [::Float]
    #     Optional. Combined custom boosts for a doc.
    # @!attribute [rw] default_rank
    #   @return [::Float]
    #     Optional. The default rank of the result.
    # @!attribute [rw] custom_signals
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals::CustomSignal>]
    #     Optional. A list of custom clearbox signals.
    class RankSignals
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Custom clearbox signal represented by name and value pair.
      # @!attribute [rw] name
      #   @return [::String]
      #     Optional. Name of the signal.
      # @!attribute [rw] value
      #   @return [::Float]
      #     Optional. Float value representing the ranking signal (e.g. 1.25 for
      #     BM25).
      class CustomSignal
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # @!attribute [rw] key
    #   @return [::String]
    # @!attribute [rw] value
    #   @return [::Google::Cloud::DiscoveryEngine::V1::DoubleList]
    class ModelScoresEntry
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # A facet result.
  # @!attribute [rw] key
  #   @return [::String]
  #     The key for this facet. For example, `"colors"` or `"price"`. It matches
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#key SearchRequest.FacetSpec.FacetKey.key}.
  # @!attribute [rw] values
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Facet::FacetValue>]
  #     The facet values for this field.
  # @!attribute [rw] dynamic_facet
  #   @return [::Boolean]
  #     Whether the facet is dynamically generated.
  class Facet
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A facet value which contains value names and their count.
    # @!attribute [rw] value
    #   @return [::String]
    #     Text value of a facet, such as "Black" for facet "colors".
    #
    #     Note: The following fields are mutually exclusive: `value`, `interval`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] interval
    #   @return [::Google::Cloud::DiscoveryEngine::V1::Interval]
    #     Interval value for a facet, such as [10, 20) for facet "price". It
    #     matches
    #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#intervals SearchRequest.FacetSpec.FacetKey.intervals}.
    #
    #     Note: The following fields are mutually exclusive: `interval`, `value`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] count
    #   @return [::Integer]
    #     Number of items that have this facet value.
    class FacetValue
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # Summary of the top N search results specified by the summary spec.
  # @!attribute [rw] summary_text
  #   @return [::String]
  #     The summary content.
  # @!attribute [rw] summary_skipped_reasons
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummarySkippedReason>]
  #     Additional summary-skipped reasons. This provides the reason for ignored
  #     cases. If nothing is skipped, this field is not set.
  # @!attribute [rw] safety_attributes
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SafetyAttributes]
  #     A collection of Safety Attribute categories and their associated
  #     confidence scores.
  # @!attribute [rw] summary_with_metadata
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummaryWithMetadata]
  #     Summary with metadata information.
  class Summary
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # Safety Attribute categories and their associated confidence scores.
    # @!attribute [rw] categories
    #   @return [::Array<::String>]
    #     The display names of Safety Attribute categories associated with the
    #     generated content. Order matches the Scores.
    # @!attribute [rw] scores
    #   @return [::Array<::Float>]
    #     The confidence scores of the each category, higher
    #     value means higher confidence. Order matches the Categories.
    class SafetyAttributes
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation metadata.
    # @!attribute [rw] citations
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Citation>]
    #     Citations for segments.
    class CitationMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation info for a segment.
    # @!attribute [rw] start_index
    #   @return [::Integer]
    #     Index indicates the start of the segment, measured in bytes/unicode.
    # @!attribute [rw] end_index
    #   @return [::Integer]
    #     End of the attributed segment, exclusive.
    # @!attribute [rw] sources
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationSource>]
    #     Citation sources for the attributed segment.
    class Citation
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation source.
    # @!attribute [rw] reference_index
    #   @return [::Integer]
    #     Document reference index from SummaryWithMetadata.references.
    #     It is 0-indexed and the value will be zero if the reference_index is
    #     not set explicitly.
    class CitationSource
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Document reference.
    # @!attribute [rw] title
    #   @return [::String]
    #     Title of the document.
    # @!attribute [rw] document
    #   @return [::String]
    #     Required.
    #     {::Google::Cloud::DiscoveryEngine::V1::Document#name Document.name} of the
    #     document. Full resource name of the referenced document, in the format
    #     `projects/*/locations/*/collections/*/dataStores/*/branches/*/documents/*`.
    # @!attribute [rw] uri
    #   @return [::String]
    #     Cloud Storage or HTTP uri for the document.
    # @!attribute [rw] chunk_contents
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference::ChunkContent>]
    #     List of cited chunk contents derived from document content.
    class Reference
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Chunk content.
      # @!attribute [rw] content
      #   @return [::String]
      #     Chunk textual content.
      # @!attribute [rw] page_identifier
      #   @return [::String]
      #     Page identifier.
      class ChunkContent
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # Summary with metadata information.
    # @!attribute [rw] summary
    #   @return [::String]
    #     Summary text with no citation information.
    # @!attribute [rw] citation_metadata
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationMetadata]
    #     Citation metadata for given summary.
    # @!attribute [rw] references
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference>]
    #     Document References.
    class SummaryWithMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # An Enum for summary-skipped reasons.
    module SummarySkippedReason
      # Default value. The summary skipped reason is not specified.
      SUMMARY_SKIPPED_REASON_UNSPECIFIED = 0

      # The adversarial query ignored case.
      #
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_adversarial_query SummarySpec.ignore_adversarial_query}
      # is set to `true`.
      ADVERSARIAL_QUERY_IGNORED = 1

      # The non-summary seeking query ignored case.
      #
      # Google skips the summary if the query is chit chat.
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_non_summary_seeking_query SummarySpec.ignore_non_summary_seeking_query}
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED = 2

      # The out-of-domain query ignored case.
      #
      # Google skips the summary if there are no high-relevance search results.
      # For example, the data store contains facts about company A but the
      # user query is asking questions about company B.
      OUT_OF_DOMAIN_QUERY_IGNORED = 3

      # The potential policy violation case.
      #
      # Google skips the summary if there is a potential policy violation
      # detected. This includes content that may be violent or toxic.
      POTENTIAL_POLICY_VIOLATION = 4

      # The LLM addon not enabled case.
      #
      # Google skips the summary if the LLM addon is not enabled.
      LLM_ADDON_NOT_ENABLED = 5

      # The no relevant content case.
      #
      # Google skips the summary if there is no relevant content in the
      # retrieved search results.
      NO_RELEVANT_CONTENT = 6

      # The jail-breaking query ignored case.
      #
      # For example, "Reply in the tone of a competing company's CEO".
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_jail_breaking_query]
      # is set to `true`.
      JAIL_BREAKING_QUERY_IGNORED = 7

      # The customer policy violation case.
      #
      # Google skips the summary if there is a customer policy violation
      # detected. The policy is defined by the customer.
      CUSTOMER_POLICY_VIOLATION = 8

      # The non-answer seeking query ignored case.
      #
      # Google skips the summary if the query doesn't have clear intent.
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_non_answer_seeking_query]
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED_V2 = 9

      # The time out case.
      #
      # Google skips the summary if the time out.
      TIME_OUT = 10
    end
  end

  # Information describing query expansion including whether expansion has
  # occurred.
  # @!attribute [rw] expanded_query
  #   @return [::Boolean]
  #     Bool describing whether query expansion has occurred.
  # @!attribute [rw] pinned_result_count
  #   @return [::Integer]
  #     Number of pinned results. This field will only be set when expansion
  #     happens and
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::QueryExpansionSpec#pin_unexpanded_results SearchRequest.QueryExpansionSpec.pin_unexpanded_results}
  #     is set to true.
  class QueryExpansionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Information describing what natural language understanding was
  # done on the input query.
  # @!attribute [rw] extracted_filters
  #   @return [::String]
  #     The filters that were extracted from the input query.
  # @!attribute [rw] rewritten_query
  #   @return [::String]
  #     Rewritten input query minus the extracted filters.
  # @!attribute [rw] classified_intents
  #   @return [::Array<::String>]
  #     The classified intents from the input query.
  # @!attribute [rw] structured_extracted_filter
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter]
  #     The filters that were extracted from the input query represented in a
  #     structured form.
  class NaturalLanguageQueryUnderstandingInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # The filters that were extracted from the input query represented in a
    # structured form.
    # @!attribute [rw] expression
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression]
    #     The expression denoting the filter that was extracted from the input
    #     query in a structured form. It can be a simple expression denoting a
    #     single string, numerical or geolocation constraint or a compound
    #     expression which is a combination of multiple expressions connected
    #     using logical (OR and AND) operators.
    class StructuredExtractedFilter
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Constraint expression of a string field.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the string field as defined in the schema.
      # @!attribute [rw] values
      #   @return [::Array<::String>]
      #     Values of the string field. The record will only be returned if the
      #     field value matches one of the values specified here.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class StringConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Constraint expression of a number field. Example: price < 100.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the numerical field as defined in the schema.
      # @!attribute [rw] comparison
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint::Comparison]
      #     The comparison operation performed between the field value and the
      #     value specified in the constraint.
      # @!attribute [rw] value
      #   @return [::Float]
      #     The value specified in the numerical constraint.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class NumberConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods

        # The comparison operation that was performed.
        module Comparison
          # Undefined comparison operator.
          COMPARISON_UNSPECIFIED = 0

          # Denotes equality `=` operator.
          EQUALS = 1

          # Denotes less than or equal to `<=` operator.
          LESS_THAN_EQUALS = 2

          # Denotes less than `<` operator.
          LESS_THAN = 3

          # Denotes greater than or equal to `>=` operator.
          GREATER_THAN_EQUALS = 4

          # Denotes greater than `>` operator.
          GREATER_THAN = 5
        end
      end

      # Constraint of a geolocation field.
      # Name of the geolocation field as defined in the schema.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     The name of the geolocation field as defined in the schema.
      # @!attribute [rw] address
      #   @return [::String]
      #     The reference address that was inferred from the input query. The
      #     proximity of the reference address to the geolocation field will be
      #     used to filter the results.
      # @!attribute [rw] latitude
      #   @return [::Float]
      #     The latitude of the geolocation inferred from the input query.
      # @!attribute [rw] longitude
      #   @return [::Float]
      #     The longitude of the geolocation inferred from the input query.
      # @!attribute [rw] radius_in_meters
      #   @return [::Float]
      #     The radius in meters around the address. The record is returned if
      #     the location of the geolocation field is within the radius.
      class GeolocationConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `And` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ANDed together.
      class AndExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `Or` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ORed together.
      class OrExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # The expression denoting the filter that was extracted from the input
      # query.
      # @!attribute [rw] string_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::StringConstraint]
      #     String constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] number_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint]
      #     Numerical constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `number_constraint`, `string_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] geolocation_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::GeolocationConstraint]
      #     Geolocation constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `geolocation_constraint`, `string_constraint`, `number_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] and_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::AndExpression]
      #     Logical "And" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `and_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] or_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::OrExpression]
      #     Logical "Or" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `or_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      class Expression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end
  end

  # Information about the session.
  # @!attribute [rw] name
  #   @return [::String]
  #     Name of the session.
  #     If the auto-session mode is used (when
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest#session SearchRequest.session}
  #     ends with "-"), this field holds the newly generated session name.
  # @!attribute [rw] query_id
  #   @return [::String]
  #     Query ID that corresponds to this search API call.
  #     One session can have multiple turns, each with a unique query ID.
  #
  #     By specifying the session name and this query ID in the Answer API call,
  #     the answer generation happens in the context of the search results from
  #     this search call.
  class SessionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Semantic state of the search response.
  module SemanticState
    # Default value. Should not be used.
    SEMANTIC_STATE_UNSPECIFIED = 0

    # Semantic search was disabled for this search response.
    DISABLED = 1

    # Semantic search was enabled for this search response.
    ENABLED = 2
  end
end

#natural_language_query_understanding_info ⇒ ::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo (readonly)

Output only. Natural language query understanding information for the returned results.

Returns:

• (::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo) —

  Output only. Natural language query understanding information for the returned results.

# File 'proto_docs/google/cloud/discoveryengine/v1/search_service.rb', line 1419

class SearchResponse
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # Represents the search results.
  # @!attribute [rw] id
  #   @return [::String]
  #     {::Google::Cloud::DiscoveryEngine::V1::Document#id Document.id} of the
  #     searched {::Google::Cloud::DiscoveryEngine::V1::Document Document}.
  # @!attribute [rw] document
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Document]
  #     The document data snippet in the search response. Only fields that are
  #     marked as `retrievable` are populated.
  # @!attribute [rw] chunk
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Chunk]
  #     The chunk data in the search response if the
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec#search_result_mode SearchRequest.ContentSearchSpec.search_result_mode}
  #     is set to
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SearchResultMode::CHUNKS CHUNKS}.
  # @!attribute [r] model_scores
  #   @return [::Google::Protobuf::Map{::String => ::Google::Cloud::DiscoveryEngine::V1::DoubleList}]
  #     Output only. Google provided available scores.
  # @!attribute [rw] rank_signals
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals]
  #     Optional. A set of ranking signals associated with the result.
  class SearchResult
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A set of ranking signals.
    # @!attribute [rw] keyword_similarity_score
    #   @return [::Float]
    #     Optional. Keyword matching adjustment.
    # @!attribute [rw] relevance_score
    #   @return [::Float]
    #     Optional. Semantic relevance adjustment.
    # @!attribute [rw] semantic_similarity_score
    #   @return [::Float]
    #     Optional. Semantic similarity adjustment.
    # @!attribute [rw] pctr_rank
    #   @return [::Float]
    #     Optional. Predicted conversion rate adjustment as a rank.
    # @!attribute [rw] topicality_rank
    #   @return [::Float]
    #     Optional. Topicality adjustment as a rank.
    # @!attribute [rw] document_age
    #   @return [::Float]
    #     Optional. Age of the document in hours.
    # @!attribute [rw] boosting_factor
    #   @return [::Float]
    #     Optional. Combined custom boosts for a doc.
    # @!attribute [rw] default_rank
    #   @return [::Float]
    #     Optional. The default rank of the result.
    # @!attribute [rw] custom_signals
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals::CustomSignal>]
    #     Optional. A list of custom clearbox signals.
    class RankSignals
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Custom clearbox signal represented by name and value pair.
      # @!attribute [rw] name
      #   @return [::String]
      #     Optional. Name of the signal.
      # @!attribute [rw] value
      #   @return [::Float]
      #     Optional. Float value representing the ranking signal (e.g. 1.25 for
      #     BM25).
      class CustomSignal
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # @!attribute [rw] key
    #   @return [::String]
    # @!attribute [rw] value
    #   @return [::Google::Cloud::DiscoveryEngine::V1::DoubleList]
    class ModelScoresEntry
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # A facet result.
  # @!attribute [rw] key
  #   @return [::String]
  #     The key for this facet. For example, `"colors"` or `"price"`. It matches
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#key SearchRequest.FacetSpec.FacetKey.key}.
  # @!attribute [rw] values
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Facet::FacetValue>]
  #     The facet values for this field.
  # @!attribute [rw] dynamic_facet
  #   @return [::Boolean]
  #     Whether the facet is dynamically generated.
  class Facet
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A facet value which contains value names and their count.
    # @!attribute [rw] value
    #   @return [::String]
    #     Text value of a facet, such as "Black" for facet "colors".
    #
    #     Note: The following fields are mutually exclusive: `value`, `interval`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] interval
    #   @return [::Google::Cloud::DiscoveryEngine::V1::Interval]
    #     Interval value for a facet, such as [10, 20) for facet "price". It
    #     matches
    #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#intervals SearchRequest.FacetSpec.FacetKey.intervals}.
    #
    #     Note: The following fields are mutually exclusive: `interval`, `value`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] count
    #   @return [::Integer]
    #     Number of items that have this facet value.
    class FacetValue
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # Summary of the top N search results specified by the summary spec.
  # @!attribute [rw] summary_text
  #   @return [::String]
  #     The summary content.
  # @!attribute [rw] summary_skipped_reasons
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummarySkippedReason>]
  #     Additional summary-skipped reasons. This provides the reason for ignored
  #     cases. If nothing is skipped, this field is not set.
  # @!attribute [rw] safety_attributes
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SafetyAttributes]
  #     A collection of Safety Attribute categories and their associated
  #     confidence scores.
  # @!attribute [rw] summary_with_metadata
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummaryWithMetadata]
  #     Summary with metadata information.
  class Summary
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # Safety Attribute categories and their associated confidence scores.
    # @!attribute [rw] categories
    #   @return [::Array<::String>]
    #     The display names of Safety Attribute categories associated with the
    #     generated content. Order matches the Scores.
    # @!attribute [rw] scores
    #   @return [::Array<::Float>]
    #     The confidence scores of the each category, higher
    #     value means higher confidence. Order matches the Categories.
    class SafetyAttributes
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation metadata.
    # @!attribute [rw] citations
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Citation>]
    #     Citations for segments.
    class CitationMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation info for a segment.
    # @!attribute [rw] start_index
    #   @return [::Integer]
    #     Index indicates the start of the segment, measured in bytes/unicode.
    # @!attribute [rw] end_index
    #   @return [::Integer]
    #     End of the attributed segment, exclusive.
    # @!attribute [rw] sources
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationSource>]
    #     Citation sources for the attributed segment.
    class Citation
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation source.
    # @!attribute [rw] reference_index
    #   @return [::Integer]
    #     Document reference index from SummaryWithMetadata.references.
    #     It is 0-indexed and the value will be zero if the reference_index is
    #     not set explicitly.
    class CitationSource
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Document reference.
    # @!attribute [rw] title
    #   @return [::String]
    #     Title of the document.
    # @!attribute [rw] document
    #   @return [::String]
    #     Required.
    #     {::Google::Cloud::DiscoveryEngine::V1::Document#name Document.name} of the
    #     document. Full resource name of the referenced document, in the format
    #     `projects/*/locations/*/collections/*/dataStores/*/branches/*/documents/*`.
    # @!attribute [rw] uri
    #   @return [::String]
    #     Cloud Storage or HTTP uri for the document.
    # @!attribute [rw] chunk_contents
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference::ChunkContent>]
    #     List of cited chunk contents derived from document content.
    class Reference
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Chunk content.
      # @!attribute [rw] content
      #   @return [::String]
      #     Chunk textual content.
      # @!attribute [rw] page_identifier
      #   @return [::String]
      #     Page identifier.
      class ChunkContent
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # Summary with metadata information.
    # @!attribute [rw] summary
    #   @return [::String]
    #     Summary text with no citation information.
    # @!attribute [rw] citation_metadata
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationMetadata]
    #     Citation metadata for given summary.
    # @!attribute [rw] references
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference>]
    #     Document References.
    class SummaryWithMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # An Enum for summary-skipped reasons.
    module SummarySkippedReason
      # Default value. The summary skipped reason is not specified.
      SUMMARY_SKIPPED_REASON_UNSPECIFIED = 0

      # The adversarial query ignored case.
      #
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_adversarial_query SummarySpec.ignore_adversarial_query}
      # is set to `true`.
      ADVERSARIAL_QUERY_IGNORED = 1

      # The non-summary seeking query ignored case.
      #
      # Google skips the summary if the query is chit chat.
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_non_summary_seeking_query SummarySpec.ignore_non_summary_seeking_query}
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED = 2

      # The out-of-domain query ignored case.
      #
      # Google skips the summary if there are no high-relevance search results.
      # For example, the data store contains facts about company A but the
      # user query is asking questions about company B.
      OUT_OF_DOMAIN_QUERY_IGNORED = 3

      # The potential policy violation case.
      #
      # Google skips the summary if there is a potential policy violation
      # detected. This includes content that may be violent or toxic.
      POTENTIAL_POLICY_VIOLATION = 4

      # The LLM addon not enabled case.
      #
      # Google skips the summary if the LLM addon is not enabled.
      LLM_ADDON_NOT_ENABLED = 5

      # The no relevant content case.
      #
      # Google skips the summary if there is no relevant content in the
      # retrieved search results.
      NO_RELEVANT_CONTENT = 6

      # The jail-breaking query ignored case.
      #
      # For example, "Reply in the tone of a competing company's CEO".
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_jail_breaking_query]
      # is set to `true`.
      JAIL_BREAKING_QUERY_IGNORED = 7

      # The customer policy violation case.
      #
      # Google skips the summary if there is a customer policy violation
      # detected. The policy is defined by the customer.
      CUSTOMER_POLICY_VIOLATION = 8

      # The non-answer seeking query ignored case.
      #
      # Google skips the summary if the query doesn't have clear intent.
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_non_answer_seeking_query]
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED_V2 = 9

      # The time out case.
      #
      # Google skips the summary if the time out.
      TIME_OUT = 10
    end
  end

  # Information describing query expansion including whether expansion has
  # occurred.
  # @!attribute [rw] expanded_query
  #   @return [::Boolean]
  #     Bool describing whether query expansion has occurred.
  # @!attribute [rw] pinned_result_count
  #   @return [::Integer]
  #     Number of pinned results. This field will only be set when expansion
  #     happens and
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::QueryExpansionSpec#pin_unexpanded_results SearchRequest.QueryExpansionSpec.pin_unexpanded_results}
  #     is set to true.
  class QueryExpansionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Information describing what natural language understanding was
  # done on the input query.
  # @!attribute [rw] extracted_filters
  #   @return [::String]
  #     The filters that were extracted from the input query.
  # @!attribute [rw] rewritten_query
  #   @return [::String]
  #     Rewritten input query minus the extracted filters.
  # @!attribute [rw] classified_intents
  #   @return [::Array<::String>]
  #     The classified intents from the input query.
  # @!attribute [rw] structured_extracted_filter
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter]
  #     The filters that were extracted from the input query represented in a
  #     structured form.
  class NaturalLanguageQueryUnderstandingInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # The filters that were extracted from the input query represented in a
    # structured form.
    # @!attribute [rw] expression
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression]
    #     The expression denoting the filter that was extracted from the input
    #     query in a structured form. It can be a simple expression denoting a
    #     single string, numerical or geolocation constraint or a compound
    #     expression which is a combination of multiple expressions connected
    #     using logical (OR and AND) operators.
    class StructuredExtractedFilter
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Constraint expression of a string field.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the string field as defined in the schema.
      # @!attribute [rw] values
      #   @return [::Array<::String>]
      #     Values of the string field. The record will only be returned if the
      #     field value matches one of the values specified here.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class StringConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Constraint expression of a number field. Example: price < 100.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the numerical field as defined in the schema.
      # @!attribute [rw] comparison
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint::Comparison]
      #     The comparison operation performed between the field value and the
      #     value specified in the constraint.
      # @!attribute [rw] value
      #   @return [::Float]
      #     The value specified in the numerical constraint.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class NumberConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods

        # The comparison operation that was performed.
        module Comparison
          # Undefined comparison operator.
          COMPARISON_UNSPECIFIED = 0

          # Denotes equality `=` operator.
          EQUALS = 1

          # Denotes less than or equal to `<=` operator.
          LESS_THAN_EQUALS = 2

          # Denotes less than `<` operator.
          LESS_THAN = 3

          # Denotes greater than or equal to `>=` operator.
          GREATER_THAN_EQUALS = 4

          # Denotes greater than `>` operator.
          GREATER_THAN = 5
        end
      end

      # Constraint of a geolocation field.
      # Name of the geolocation field as defined in the schema.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     The name of the geolocation field as defined in the schema.
      # @!attribute [rw] address
      #   @return [::String]
      #     The reference address that was inferred from the input query. The
      #     proximity of the reference address to the geolocation field will be
      #     used to filter the results.
      # @!attribute [rw] latitude
      #   @return [::Float]
      #     The latitude of the geolocation inferred from the input query.
      # @!attribute [rw] longitude
      #   @return [::Float]
      #     The longitude of the geolocation inferred from the input query.
      # @!attribute [rw] radius_in_meters
      #   @return [::Float]
      #     The radius in meters around the address. The record is returned if
      #     the location of the geolocation field is within the radius.
      class GeolocationConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `And` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ANDed together.
      class AndExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `Or` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ORed together.
      class OrExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # The expression denoting the filter that was extracted from the input
      # query.
      # @!attribute [rw] string_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::StringConstraint]
      #     String constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] number_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint]
      #     Numerical constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `number_constraint`, `string_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] geolocation_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::GeolocationConstraint]
      #     Geolocation constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `geolocation_constraint`, `string_constraint`, `number_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] and_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::AndExpression]
      #     Logical "And" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `and_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] or_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::OrExpression]
      #     Logical "Or" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `or_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      class Expression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end
  end

  # Information about the session.
  # @!attribute [rw] name
  #   @return [::String]
  #     Name of the session.
  #     If the auto-session mode is used (when
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest#session SearchRequest.session}
  #     ends with "-"), this field holds the newly generated session name.
  # @!attribute [rw] query_id
  #   @return [::String]
  #     Query ID that corresponds to this search API call.
  #     One session can have multiple turns, each with a unique query ID.
  #
  #     By specifying the session name and this query ID in the Answer API call,
  #     the answer generation happens in the context of the search results from
  #     this search call.
  class SessionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Semantic state of the search response.
  module SemanticState
    # Default value. Should not be used.
    SEMANTIC_STATE_UNSPECIFIED = 0

    # Semantic search was disabled for this search response.
    DISABLED = 1

    # Semantic search was enabled for this search response.
    ENABLED = 2
  end
end

#next_page_token ⇒ ::String

Returns A token that can be sent as SearchRequest.page_token to retrieve the next page. If this field is omitted, there are no subsequent pages.

Returns:

• (::String) —

  A token that can be sent as SearchRequest.page_token to retrieve the next page. If this field is omitted, there are no subsequent pages.

# File 'proto_docs/google/cloud/discoveryengine/v1/search_service.rb', line 1419

class SearchResponse
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # Represents the search results.
  # @!attribute [rw] id
  #   @return [::String]
  #     {::Google::Cloud::DiscoveryEngine::V1::Document#id Document.id} of the
  #     searched {::Google::Cloud::DiscoveryEngine::V1::Document Document}.
  # @!attribute [rw] document
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Document]
  #     The document data snippet in the search response. Only fields that are
  #     marked as `retrievable` are populated.
  # @!attribute [rw] chunk
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Chunk]
  #     The chunk data in the search response if the
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec#search_result_mode SearchRequest.ContentSearchSpec.search_result_mode}
  #     is set to
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SearchResultMode::CHUNKS CHUNKS}.
  # @!attribute [r] model_scores
  #   @return [::Google::Protobuf::Map{::String => ::Google::Cloud::DiscoveryEngine::V1::DoubleList}]
  #     Output only. Google provided available scores.
  # @!attribute [rw] rank_signals
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals]
  #     Optional. A set of ranking signals associated with the result.
  class SearchResult
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A set of ranking signals.
    # @!attribute [rw] keyword_similarity_score
    #   @return [::Float]
    #     Optional. Keyword matching adjustment.
    # @!attribute [rw] relevance_score
    #   @return [::Float]
    #     Optional. Semantic relevance adjustment.
    # @!attribute [rw] semantic_similarity_score
    #   @return [::Float]
    #     Optional. Semantic similarity adjustment.
    # @!attribute [rw] pctr_rank
    #   @return [::Float]
    #     Optional. Predicted conversion rate adjustment as a rank.
    # @!attribute [rw] topicality_rank
    #   @return [::Float]
    #     Optional. Topicality adjustment as a rank.
    # @!attribute [rw] document_age
    #   @return [::Float]
    #     Optional. Age of the document in hours.
    # @!attribute [rw] boosting_factor
    #   @return [::Float]
    #     Optional. Combined custom boosts for a doc.
    # @!attribute [rw] default_rank
    #   @return [::Float]
    #     Optional. The default rank of the result.
    # @!attribute [rw] custom_signals
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals::CustomSignal>]
    #     Optional. A list of custom clearbox signals.
    class RankSignals
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Custom clearbox signal represented by name and value pair.
      # @!attribute [rw] name
      #   @return [::String]
      #     Optional. Name of the signal.
      # @!attribute [rw] value
      #   @return [::Float]
      #     Optional. Float value representing the ranking signal (e.g. 1.25 for
      #     BM25).
      class CustomSignal
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # @!attribute [rw] key
    #   @return [::String]
    # @!attribute [rw] value
    #   @return [::Google::Cloud::DiscoveryEngine::V1::DoubleList]
    class ModelScoresEntry
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # A facet result.
  # @!attribute [rw] key
  #   @return [::String]
  #     The key for this facet. For example, `"colors"` or `"price"`. It matches
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#key SearchRequest.FacetSpec.FacetKey.key}.
  # @!attribute [rw] values
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Facet::FacetValue>]
  #     The facet values for this field.
  # @!attribute [rw] dynamic_facet
  #   @return [::Boolean]
  #     Whether the facet is dynamically generated.
  class Facet
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A facet value which contains value names and their count.
    # @!attribute [rw] value
    #   @return [::String]
    #     Text value of a facet, such as "Black" for facet "colors".
    #
    #     Note: The following fields are mutually exclusive: `value`, `interval`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] interval
    #   @return [::Google::Cloud::DiscoveryEngine::V1::Interval]
    #     Interval value for a facet, such as [10, 20) for facet "price". It
    #     matches
    #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#intervals SearchRequest.FacetSpec.FacetKey.intervals}.
    #
    #     Note: The following fields are mutually exclusive: `interval`, `value`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] count
    #   @return [::Integer]
    #     Number of items that have this facet value.
    class FacetValue
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # Summary of the top N search results specified by the summary spec.
  # @!attribute [rw] summary_text
  #   @return [::String]
  #     The summary content.
  # @!attribute [rw] summary_skipped_reasons
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummarySkippedReason>]
  #     Additional summary-skipped reasons. This provides the reason for ignored
  #     cases. If nothing is skipped, this field is not set.
  # @!attribute [rw] safety_attributes
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SafetyAttributes]
  #     A collection of Safety Attribute categories and their associated
  #     confidence scores.
  # @!attribute [rw] summary_with_metadata
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummaryWithMetadata]
  #     Summary with metadata information.
  class Summary
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # Safety Attribute categories and their associated confidence scores.
    # @!attribute [rw] categories
    #   @return [::Array<::String>]
    #     The display names of Safety Attribute categories associated with the
    #     generated content. Order matches the Scores.
    # @!attribute [rw] scores
    #   @return [::Array<::Float>]
    #     The confidence scores of the each category, higher
    #     value means higher confidence. Order matches the Categories.
    class SafetyAttributes
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation metadata.
    # @!attribute [rw] citations
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Citation>]
    #     Citations for segments.
    class CitationMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation info for a segment.
    # @!attribute [rw] start_index
    #   @return [::Integer]
    #     Index indicates the start of the segment, measured in bytes/unicode.
    # @!attribute [rw] end_index
    #   @return [::Integer]
    #     End of the attributed segment, exclusive.
    # @!attribute [rw] sources
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationSource>]
    #     Citation sources for the attributed segment.
    class Citation
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation source.
    # @!attribute [rw] reference_index
    #   @return [::Integer]
    #     Document reference index from SummaryWithMetadata.references.
    #     It is 0-indexed and the value will be zero if the reference_index is
    #     not set explicitly.
    class CitationSource
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Document reference.
    # @!attribute [rw] title
    #   @return [::String]
    #     Title of the document.
    # @!attribute [rw] document
    #   @return [::String]
    #     Required.
    #     {::Google::Cloud::DiscoveryEngine::V1::Document#name Document.name} of the
    #     document. Full resource name of the referenced document, in the format
    #     `projects/*/locations/*/collections/*/dataStores/*/branches/*/documents/*`.
    # @!attribute [rw] uri
    #   @return [::String]
    #     Cloud Storage or HTTP uri for the document.
    # @!attribute [rw] chunk_contents
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference::ChunkContent>]
    #     List of cited chunk contents derived from document content.
    class Reference
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Chunk content.
      # @!attribute [rw] content
      #   @return [::String]
      #     Chunk textual content.
      # @!attribute [rw] page_identifier
      #   @return [::String]
      #     Page identifier.
      class ChunkContent
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # Summary with metadata information.
    # @!attribute [rw] summary
    #   @return [::String]
    #     Summary text with no citation information.
    # @!attribute [rw] citation_metadata
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationMetadata]
    #     Citation metadata for given summary.
    # @!attribute [rw] references
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference>]
    #     Document References.
    class SummaryWithMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # An Enum for summary-skipped reasons.
    module SummarySkippedReason
      # Default value. The summary skipped reason is not specified.
      SUMMARY_SKIPPED_REASON_UNSPECIFIED = 0

      # The adversarial query ignored case.
      #
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_adversarial_query SummarySpec.ignore_adversarial_query}
      # is set to `true`.
      ADVERSARIAL_QUERY_IGNORED = 1

      # The non-summary seeking query ignored case.
      #
      # Google skips the summary if the query is chit chat.
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_non_summary_seeking_query SummarySpec.ignore_non_summary_seeking_query}
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED = 2

      # The out-of-domain query ignored case.
      #
      # Google skips the summary if there are no high-relevance search results.
      # For example, the data store contains facts about company A but the
      # user query is asking questions about company B.
      OUT_OF_DOMAIN_QUERY_IGNORED = 3

      # The potential policy violation case.
      #
      # Google skips the summary if there is a potential policy violation
      # detected. This includes content that may be violent or toxic.
      POTENTIAL_POLICY_VIOLATION = 4

      # The LLM addon not enabled case.
      #
      # Google skips the summary if the LLM addon is not enabled.
      LLM_ADDON_NOT_ENABLED = 5

      # The no relevant content case.
      #
      # Google skips the summary if there is no relevant content in the
      # retrieved search results.
      NO_RELEVANT_CONTENT = 6

      # The jail-breaking query ignored case.
      #
      # For example, "Reply in the tone of a competing company's CEO".
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_jail_breaking_query]
      # is set to `true`.
      JAIL_BREAKING_QUERY_IGNORED = 7

      # The customer policy violation case.
      #
      # Google skips the summary if there is a customer policy violation
      # detected. The policy is defined by the customer.
      CUSTOMER_POLICY_VIOLATION = 8

      # The non-answer seeking query ignored case.
      #
      # Google skips the summary if the query doesn't have clear intent.
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_non_answer_seeking_query]
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED_V2 = 9

      # The time out case.
      #
      # Google skips the summary if the time out.
      TIME_OUT = 10
    end
  end

  # Information describing query expansion including whether expansion has
  # occurred.
  # @!attribute [rw] expanded_query
  #   @return [::Boolean]
  #     Bool describing whether query expansion has occurred.
  # @!attribute [rw] pinned_result_count
  #   @return [::Integer]
  #     Number of pinned results. This field will only be set when expansion
  #     happens and
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::QueryExpansionSpec#pin_unexpanded_results SearchRequest.QueryExpansionSpec.pin_unexpanded_results}
  #     is set to true.
  class QueryExpansionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Information describing what natural language understanding was
  # done on the input query.
  # @!attribute [rw] extracted_filters
  #   @return [::String]
  #     The filters that were extracted from the input query.
  # @!attribute [rw] rewritten_query
  #   @return [::String]
  #     Rewritten input query minus the extracted filters.
  # @!attribute [rw] classified_intents
  #   @return [::Array<::String>]
  #     The classified intents from the input query.
  # @!attribute [rw] structured_extracted_filter
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter]
  #     The filters that were extracted from the input query represented in a
  #     structured form.
  class NaturalLanguageQueryUnderstandingInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # The filters that were extracted from the input query represented in a
    # structured form.
    # @!attribute [rw] expression
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression]
    #     The expression denoting the filter that was extracted from the input
    #     query in a structured form. It can be a simple expression denoting a
    #     single string, numerical or geolocation constraint or a compound
    #     expression which is a combination of multiple expressions connected
    #     using logical (OR and AND) operators.
    class StructuredExtractedFilter
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Constraint expression of a string field.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the string field as defined in the schema.
      # @!attribute [rw] values
      #   @return [::Array<::String>]
      #     Values of the string field. The record will only be returned if the
      #     field value matches one of the values specified here.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class StringConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Constraint expression of a number field. Example: price < 100.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the numerical field as defined in the schema.
      # @!attribute [rw] comparison
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint::Comparison]
      #     The comparison operation performed between the field value and the
      #     value specified in the constraint.
      # @!attribute [rw] value
      #   @return [::Float]
      #     The value specified in the numerical constraint.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class NumberConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods

        # The comparison operation that was performed.
        module Comparison
          # Undefined comparison operator.
          COMPARISON_UNSPECIFIED = 0

          # Denotes equality `=` operator.
          EQUALS = 1

          # Denotes less than or equal to `<=` operator.
          LESS_THAN_EQUALS = 2

          # Denotes less than `<` operator.
          LESS_THAN = 3

          # Denotes greater than or equal to `>=` operator.
          GREATER_THAN_EQUALS = 4

          # Denotes greater than `>` operator.
          GREATER_THAN = 5
        end
      end

      # Constraint of a geolocation field.
      # Name of the geolocation field as defined in the schema.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     The name of the geolocation field as defined in the schema.
      # @!attribute [rw] address
      #   @return [::String]
      #     The reference address that was inferred from the input query. The
      #     proximity of the reference address to the geolocation field will be
      #     used to filter the results.
      # @!attribute [rw] latitude
      #   @return [::Float]
      #     The latitude of the geolocation inferred from the input query.
      # @!attribute [rw] longitude
      #   @return [::Float]
      #     The longitude of the geolocation inferred from the input query.
      # @!attribute [rw] radius_in_meters
      #   @return [::Float]
      #     The radius in meters around the address. The record is returned if
      #     the location of the geolocation field is within the radius.
      class GeolocationConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `And` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ANDed together.
      class AndExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `Or` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ORed together.
      class OrExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # The expression denoting the filter that was extracted from the input
      # query.
      # @!attribute [rw] string_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::StringConstraint]
      #     String constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] number_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint]
      #     Numerical constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `number_constraint`, `string_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] geolocation_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::GeolocationConstraint]
      #     Geolocation constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `geolocation_constraint`, `string_constraint`, `number_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] and_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::AndExpression]
      #     Logical "And" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `and_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] or_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::OrExpression]
      #     Logical "Or" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `or_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      class Expression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end
  end

  # Information about the session.
  # @!attribute [rw] name
  #   @return [::String]
  #     Name of the session.
  #     If the auto-session mode is used (when
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest#session SearchRequest.session}
  #     ends with "-"), this field holds the newly generated session name.
  # @!attribute [rw] query_id
  #   @return [::String]
  #     Query ID that corresponds to this search API call.
  #     One session can have multiple turns, each with a unique query ID.
  #
  #     By specifying the session name and this query ID in the Answer API call,
  #     the answer generation happens in the context of the search results from
  #     this search call.
  class SessionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Semantic state of the search response.
  module SemanticState
    # Default value. Should not be used.
    SEMANTIC_STATE_UNSPECIFIED = 0

    # Semantic search was disabled for this search response.
    DISABLED = 1

    # Semantic search was enabled for this search response.
    ENABLED = 2
  end
end

#query_expansion_info ⇒ ::Google::Cloud::DiscoveryEngine::V1::SearchResponse::QueryExpansionInfo

Returns Query expansion information for the returned results.

Returns:

• (::Google::Cloud::DiscoveryEngine::V1::SearchResponse::QueryExpansionInfo) —

  Query expansion information for the returned results.

# File 'proto_docs/google/cloud/discoveryengine/v1/search_service.rb', line 1419

class SearchResponse
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # Represents the search results.
  # @!attribute [rw] id
  #   @return [::String]
  #     {::Google::Cloud::DiscoveryEngine::V1::Document#id Document.id} of the
  #     searched {::Google::Cloud::DiscoveryEngine::V1::Document Document}.
  # @!attribute [rw] document
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Document]
  #     The document data snippet in the search response. Only fields that are
  #     marked as `retrievable` are populated.
  # @!attribute [rw] chunk
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Chunk]
  #     The chunk data in the search response if the
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec#search_result_mode SearchRequest.ContentSearchSpec.search_result_mode}
  #     is set to
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SearchResultMode::CHUNKS CHUNKS}.
  # @!attribute [r] model_scores
  #   @return [::Google::Protobuf::Map{::String => ::Google::Cloud::DiscoveryEngine::V1::DoubleList}]
  #     Output only. Google provided available scores.
  # @!attribute [rw] rank_signals
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals]
  #     Optional. A set of ranking signals associated with the result.
  class SearchResult
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A set of ranking signals.
    # @!attribute [rw] keyword_similarity_score
    #   @return [::Float]
    #     Optional. Keyword matching adjustment.
    # @!attribute [rw] relevance_score
    #   @return [::Float]
    #     Optional. Semantic relevance adjustment.
    # @!attribute [rw] semantic_similarity_score
    #   @return [::Float]
    #     Optional. Semantic similarity adjustment.
    # @!attribute [rw] pctr_rank
    #   @return [::Float]
    #     Optional. Predicted conversion rate adjustment as a rank.
    # @!attribute [rw] topicality_rank
    #   @return [::Float]
    #     Optional. Topicality adjustment as a rank.
    # @!attribute [rw] document_age
    #   @return [::Float]
    #     Optional. Age of the document in hours.
    # @!attribute [rw] boosting_factor
    #   @return [::Float]
    #     Optional. Combined custom boosts for a doc.
    # @!attribute [rw] default_rank
    #   @return [::Float]
    #     Optional. The default rank of the result.
    # @!attribute [rw] custom_signals
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals::CustomSignal>]
    #     Optional. A list of custom clearbox signals.
    class RankSignals
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Custom clearbox signal represented by name and value pair.
      # @!attribute [rw] name
      #   @return [::String]
      #     Optional. Name of the signal.
      # @!attribute [rw] value
      #   @return [::Float]
      #     Optional. Float value representing the ranking signal (e.g. 1.25 for
      #     BM25).
      class CustomSignal
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # @!attribute [rw] key
    #   @return [::String]
    # @!attribute [rw] value
    #   @return [::Google::Cloud::DiscoveryEngine::V1::DoubleList]
    class ModelScoresEntry
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # A facet result.
  # @!attribute [rw] key
  #   @return [::String]
  #     The key for this facet. For example, `"colors"` or `"price"`. It matches
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#key SearchRequest.FacetSpec.FacetKey.key}.
  # @!attribute [rw] values
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Facet::FacetValue>]
  #     The facet values for this field.
  # @!attribute [rw] dynamic_facet
  #   @return [::Boolean]
  #     Whether the facet is dynamically generated.
  class Facet
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A facet value which contains value names and their count.
    # @!attribute [rw] value
    #   @return [::String]
    #     Text value of a facet, such as "Black" for facet "colors".
    #
    #     Note: The following fields are mutually exclusive: `value`, `interval`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] interval
    #   @return [::Google::Cloud::DiscoveryEngine::V1::Interval]
    #     Interval value for a facet, such as [10, 20) for facet "price". It
    #     matches
    #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#intervals SearchRequest.FacetSpec.FacetKey.intervals}.
    #
    #     Note: The following fields are mutually exclusive: `interval`, `value`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] count
    #   @return [::Integer]
    #     Number of items that have this facet value.
    class FacetValue
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # Summary of the top N search results specified by the summary spec.
  # @!attribute [rw] summary_text
  #   @return [::String]
  #     The summary content.
  # @!attribute [rw] summary_skipped_reasons
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummarySkippedReason>]
  #     Additional summary-skipped reasons. This provides the reason for ignored
  #     cases. If nothing is skipped, this field is not set.
  # @!attribute [rw] safety_attributes
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SafetyAttributes]
  #     A collection of Safety Attribute categories and their associated
  #     confidence scores.
  # @!attribute [rw] summary_with_metadata
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummaryWithMetadata]
  #     Summary with metadata information.
  class Summary
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # Safety Attribute categories and their associated confidence scores.
    # @!attribute [rw] categories
    #   @return [::Array<::String>]
    #     The display names of Safety Attribute categories associated with the
    #     generated content. Order matches the Scores.
    # @!attribute [rw] scores
    #   @return [::Array<::Float>]
    #     The confidence scores of the each category, higher
    #     value means higher confidence. Order matches the Categories.
    class SafetyAttributes
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation metadata.
    # @!attribute [rw] citations
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Citation>]
    #     Citations for segments.
    class CitationMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation info for a segment.
    # @!attribute [rw] start_index
    #   @return [::Integer]
    #     Index indicates the start of the segment, measured in bytes/unicode.
    # @!attribute [rw] end_index
    #   @return [::Integer]
    #     End of the attributed segment, exclusive.
    # @!attribute [rw] sources
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationSource>]
    #     Citation sources for the attributed segment.
    class Citation
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation source.
    # @!attribute [rw] reference_index
    #   @return [::Integer]
    #     Document reference index from SummaryWithMetadata.references.
    #     It is 0-indexed and the value will be zero if the reference_index is
    #     not set explicitly.
    class CitationSource
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Document reference.
    # @!attribute [rw] title
    #   @return [::String]
    #     Title of the document.
    # @!attribute [rw] document
    #   @return [::String]
    #     Required.
    #     {::Google::Cloud::DiscoveryEngine::V1::Document#name Document.name} of the
    #     document. Full resource name of the referenced document, in the format
    #     `projects/*/locations/*/collections/*/dataStores/*/branches/*/documents/*`.
    # @!attribute [rw] uri
    #   @return [::String]
    #     Cloud Storage or HTTP uri for the document.
    # @!attribute [rw] chunk_contents
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference::ChunkContent>]
    #     List of cited chunk contents derived from document content.
    class Reference
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Chunk content.
      # @!attribute [rw] content
      #   @return [::String]
      #     Chunk textual content.
      # @!attribute [rw] page_identifier
      #   @return [::String]
      #     Page identifier.
      class ChunkContent
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # Summary with metadata information.
    # @!attribute [rw] summary
    #   @return [::String]
    #     Summary text with no citation information.
    # @!attribute [rw] citation_metadata
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationMetadata]
    #     Citation metadata for given summary.
    # @!attribute [rw] references
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference>]
    #     Document References.
    class SummaryWithMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # An Enum for summary-skipped reasons.
    module SummarySkippedReason
      # Default value. The summary skipped reason is not specified.
      SUMMARY_SKIPPED_REASON_UNSPECIFIED = 0

      # The adversarial query ignored case.
      #
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_adversarial_query SummarySpec.ignore_adversarial_query}
      # is set to `true`.
      ADVERSARIAL_QUERY_IGNORED = 1

      # The non-summary seeking query ignored case.
      #
      # Google skips the summary if the query is chit chat.
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_non_summary_seeking_query SummarySpec.ignore_non_summary_seeking_query}
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED = 2

      # The out-of-domain query ignored case.
      #
      # Google skips the summary if there are no high-relevance search results.
      # For example, the data store contains facts about company A but the
      # user query is asking questions about company B.
      OUT_OF_DOMAIN_QUERY_IGNORED = 3

      # The potential policy violation case.
      #
      # Google skips the summary if there is a potential policy violation
      # detected. This includes content that may be violent or toxic.
      POTENTIAL_POLICY_VIOLATION = 4

      # The LLM addon not enabled case.
      #
      # Google skips the summary if the LLM addon is not enabled.
      LLM_ADDON_NOT_ENABLED = 5

      # The no relevant content case.
      #
      # Google skips the summary if there is no relevant content in the
      # retrieved search results.
      NO_RELEVANT_CONTENT = 6

      # The jail-breaking query ignored case.
      #
      # For example, "Reply in the tone of a competing company's CEO".
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_jail_breaking_query]
      # is set to `true`.
      JAIL_BREAKING_QUERY_IGNORED = 7

      # The customer policy violation case.
      #
      # Google skips the summary if there is a customer policy violation
      # detected. The policy is defined by the customer.
      CUSTOMER_POLICY_VIOLATION = 8

      # The non-answer seeking query ignored case.
      #
      # Google skips the summary if the query doesn't have clear intent.
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_non_answer_seeking_query]
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED_V2 = 9

      # The time out case.
      #
      # Google skips the summary if the time out.
      TIME_OUT = 10
    end
  end

  # Information describing query expansion including whether expansion has
  # occurred.
  # @!attribute [rw] expanded_query
  #   @return [::Boolean]
  #     Bool describing whether query expansion has occurred.
  # @!attribute [rw] pinned_result_count
  #   @return [::Integer]
  #     Number of pinned results. This field will only be set when expansion
  #     happens and
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::QueryExpansionSpec#pin_unexpanded_results SearchRequest.QueryExpansionSpec.pin_unexpanded_results}
  #     is set to true.
  class QueryExpansionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Information describing what natural language understanding was
  # done on the input query.
  # @!attribute [rw] extracted_filters
  #   @return [::String]
  #     The filters that were extracted from the input query.
  # @!attribute [rw] rewritten_query
  #   @return [::String]
  #     Rewritten input query minus the extracted filters.
  # @!attribute [rw] classified_intents
  #   @return [::Array<::String>]
  #     The classified intents from the input query.
  # @!attribute [rw] structured_extracted_filter
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter]
  #     The filters that were extracted from the input query represented in a
  #     structured form.
  class NaturalLanguageQueryUnderstandingInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # The filters that were extracted from the input query represented in a
    # structured form.
    # @!attribute [rw] expression
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression]
    #     The expression denoting the filter that was extracted from the input
    #     query in a structured form. It can be a simple expression denoting a
    #     single string, numerical or geolocation constraint or a compound
    #     expression which is a combination of multiple expressions connected
    #     using logical (OR and AND) operators.
    class StructuredExtractedFilter
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Constraint expression of a string field.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the string field as defined in the schema.
      # @!attribute [rw] values
      #   @return [::Array<::String>]
      #     Values of the string field. The record will only be returned if the
      #     field value matches one of the values specified here.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class StringConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Constraint expression of a number field. Example: price < 100.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the numerical field as defined in the schema.
      # @!attribute [rw] comparison
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint::Comparison]
      #     The comparison operation performed between the field value and the
      #     value specified in the constraint.
      # @!attribute [rw] value
      #   @return [::Float]
      #     The value specified in the numerical constraint.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class NumberConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods

        # The comparison operation that was performed.
        module Comparison
          # Undefined comparison operator.
          COMPARISON_UNSPECIFIED = 0

          # Denotes equality `=` operator.
          EQUALS = 1

          # Denotes less than or equal to `<=` operator.
          LESS_THAN_EQUALS = 2

          # Denotes less than `<` operator.
          LESS_THAN = 3

          # Denotes greater than or equal to `>=` operator.
          GREATER_THAN_EQUALS = 4

          # Denotes greater than `>` operator.
          GREATER_THAN = 5
        end
      end

      # Constraint of a geolocation field.
      # Name of the geolocation field as defined in the schema.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     The name of the geolocation field as defined in the schema.
      # @!attribute [rw] address
      #   @return [::String]
      #     The reference address that was inferred from the input query. The
      #     proximity of the reference address to the geolocation field will be
      #     used to filter the results.
      # @!attribute [rw] latitude
      #   @return [::Float]
      #     The latitude of the geolocation inferred from the input query.
      # @!attribute [rw] longitude
      #   @return [::Float]
      #     The longitude of the geolocation inferred from the input query.
      # @!attribute [rw] radius_in_meters
      #   @return [::Float]
      #     The radius in meters around the address. The record is returned if
      #     the location of the geolocation field is within the radius.
      class GeolocationConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `And` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ANDed together.
      class AndExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `Or` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ORed together.
      class OrExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # The expression denoting the filter that was extracted from the input
      # query.
      # @!attribute [rw] string_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::StringConstraint]
      #     String constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] number_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint]
      #     Numerical constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `number_constraint`, `string_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] geolocation_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::GeolocationConstraint]
      #     Geolocation constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `geolocation_constraint`, `string_constraint`, `number_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] and_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::AndExpression]
      #     Logical "And" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `and_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] or_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::OrExpression]
      #     Logical "Or" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `or_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      class Expression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end
  end

  # Information about the session.
  # @!attribute [rw] name
  #   @return [::String]
  #     Name of the session.
  #     If the auto-session mode is used (when
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest#session SearchRequest.session}
  #     ends with "-"), this field holds the newly generated session name.
  # @!attribute [rw] query_id
  #   @return [::String]
  #     Query ID that corresponds to this search API call.
  #     One session can have multiple turns, each with a unique query ID.
  #
  #     By specifying the session name and this query ID in the Answer API call,
  #     the answer generation happens in the context of the search results from
  #     this search call.
  class SessionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Semantic state of the search response.
  module SemanticState
    # Default value. Should not be used.
    SEMANTIC_STATE_UNSPECIFIED = 0

    # Semantic search was disabled for this search response.
    DISABLED = 1

    # Semantic search was enabled for this search response.
    ENABLED = 2
  end
end

#redirect_uri ⇒ ::String

Returns The URI of a customer-defined redirect page. If redirect action is triggered, no search is performed, and only redirect_uri and attribution_token are set in the response.

Returns:

• (::String) —

  The URI of a customer-defined redirect page. If redirect action is triggered, no search is performed, and only redirect_uri and attribution_token are set in the response.

# File 'proto_docs/google/cloud/discoveryengine/v1/search_service.rb', line 1419

class SearchResponse
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # Represents the search results.
  # @!attribute [rw] id
  #   @return [::String]
  #     {::Google::Cloud::DiscoveryEngine::V1::Document#id Document.id} of the
  #     searched {::Google::Cloud::DiscoveryEngine::V1::Document Document}.
  # @!attribute [rw] document
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Document]
  #     The document data snippet in the search response. Only fields that are
  #     marked as `retrievable` are populated.
  # @!attribute [rw] chunk
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Chunk]
  #     The chunk data in the search response if the
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec#search_result_mode SearchRequest.ContentSearchSpec.search_result_mode}
  #     is set to
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SearchResultMode::CHUNKS CHUNKS}.
  # @!attribute [r] model_scores
  #   @return [::Google::Protobuf::Map{::String => ::Google::Cloud::DiscoveryEngine::V1::DoubleList}]
  #     Output only. Google provided available scores.
  # @!attribute [rw] rank_signals
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals]
  #     Optional. A set of ranking signals associated with the result.
  class SearchResult
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A set of ranking signals.
    # @!attribute [rw] keyword_similarity_score
    #   @return [::Float]
    #     Optional. Keyword matching adjustment.
    # @!attribute [rw] relevance_score
    #   @return [::Float]
    #     Optional. Semantic relevance adjustment.
    # @!attribute [rw] semantic_similarity_score
    #   @return [::Float]
    #     Optional. Semantic similarity adjustment.
    # @!attribute [rw] pctr_rank
    #   @return [::Float]
    #     Optional. Predicted conversion rate adjustment as a rank.
    # @!attribute [rw] topicality_rank
    #   @return [::Float]
    #     Optional. Topicality adjustment as a rank.
    # @!attribute [rw] document_age
    #   @return [::Float]
    #     Optional. Age of the document in hours.
    # @!attribute [rw] boosting_factor
    #   @return [::Float]
    #     Optional. Combined custom boosts for a doc.
    # @!attribute [rw] default_rank
    #   @return [::Float]
    #     Optional. The default rank of the result.
    # @!attribute [rw] custom_signals
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals::CustomSignal>]
    #     Optional. A list of custom clearbox signals.
    class RankSignals
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Custom clearbox signal represented by name and value pair.
      # @!attribute [rw] name
      #   @return [::String]
      #     Optional. Name of the signal.
      # @!attribute [rw] value
      #   @return [::Float]
      #     Optional. Float value representing the ranking signal (e.g. 1.25 for
      #     BM25).
      class CustomSignal
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # @!attribute [rw] key
    #   @return [::String]
    # @!attribute [rw] value
    #   @return [::Google::Cloud::DiscoveryEngine::V1::DoubleList]
    class ModelScoresEntry
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # A facet result.
  # @!attribute [rw] key
  #   @return [::String]
  #     The key for this facet. For example, `"colors"` or `"price"`. It matches
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#key SearchRequest.FacetSpec.FacetKey.key}.
  # @!attribute [rw] values
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Facet::FacetValue>]
  #     The facet values for this field.
  # @!attribute [rw] dynamic_facet
  #   @return [::Boolean]
  #     Whether the facet is dynamically generated.
  class Facet
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A facet value which contains value names and their count.
    # @!attribute [rw] value
    #   @return [::String]
    #     Text value of a facet, such as "Black" for facet "colors".
    #
    #     Note: The following fields are mutually exclusive: `value`, `interval`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] interval
    #   @return [::Google::Cloud::DiscoveryEngine::V1::Interval]
    #     Interval value for a facet, such as [10, 20) for facet "price". It
    #     matches
    #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#intervals SearchRequest.FacetSpec.FacetKey.intervals}.
    #
    #     Note: The following fields are mutually exclusive: `interval`, `value`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] count
    #   @return [::Integer]
    #     Number of items that have this facet value.
    class FacetValue
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # Summary of the top N search results specified by the summary spec.
  # @!attribute [rw] summary_text
  #   @return [::String]
  #     The summary content.
  # @!attribute [rw] summary_skipped_reasons
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummarySkippedReason>]
  #     Additional summary-skipped reasons. This provides the reason for ignored
  #     cases. If nothing is skipped, this field is not set.
  # @!attribute [rw] safety_attributes
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SafetyAttributes]
  #     A collection of Safety Attribute categories and their associated
  #     confidence scores.
  # @!attribute [rw] summary_with_metadata
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummaryWithMetadata]
  #     Summary with metadata information.
  class Summary
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # Safety Attribute categories and their associated confidence scores.
    # @!attribute [rw] categories
    #   @return [::Array<::String>]
    #     The display names of Safety Attribute categories associated with the
    #     generated content. Order matches the Scores.
    # @!attribute [rw] scores
    #   @return [::Array<::Float>]
    #     The confidence scores of the each category, higher
    #     value means higher confidence. Order matches the Categories.
    class SafetyAttributes
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation metadata.
    # @!attribute [rw] citations
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Citation>]
    #     Citations for segments.
    class CitationMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation info for a segment.
    # @!attribute [rw] start_index
    #   @return [::Integer]
    #     Index indicates the start of the segment, measured in bytes/unicode.
    # @!attribute [rw] end_index
    #   @return [::Integer]
    #     End of the attributed segment, exclusive.
    # @!attribute [rw] sources
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationSource>]
    #     Citation sources for the attributed segment.
    class Citation
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation source.
    # @!attribute [rw] reference_index
    #   @return [::Integer]
    #     Document reference index from SummaryWithMetadata.references.
    #     It is 0-indexed and the value will be zero if the reference_index is
    #     not set explicitly.
    class CitationSource
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Document reference.
    # @!attribute [rw] title
    #   @return [::String]
    #     Title of the document.
    # @!attribute [rw] document
    #   @return [::String]
    #     Required.
    #     {::Google::Cloud::DiscoveryEngine::V1::Document#name Document.name} of the
    #     document. Full resource name of the referenced document, in the format
    #     `projects/*/locations/*/collections/*/dataStores/*/branches/*/documents/*`.
    # @!attribute [rw] uri
    #   @return [::String]
    #     Cloud Storage or HTTP uri for the document.
    # @!attribute [rw] chunk_contents
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference::ChunkContent>]
    #     List of cited chunk contents derived from document content.
    class Reference
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Chunk content.
      # @!attribute [rw] content
      #   @return [::String]
      #     Chunk textual content.
      # @!attribute [rw] page_identifier
      #   @return [::String]
      #     Page identifier.
      class ChunkContent
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # Summary with metadata information.
    # @!attribute [rw] summary
    #   @return [::String]
    #     Summary text with no citation information.
    # @!attribute [rw] citation_metadata
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationMetadata]
    #     Citation metadata for given summary.
    # @!attribute [rw] references
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference>]
    #     Document References.
    class SummaryWithMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # An Enum for summary-skipped reasons.
    module SummarySkippedReason
      # Default value. The summary skipped reason is not specified.
      SUMMARY_SKIPPED_REASON_UNSPECIFIED = 0

      # The adversarial query ignored case.
      #
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_adversarial_query SummarySpec.ignore_adversarial_query}
      # is set to `true`.
      ADVERSARIAL_QUERY_IGNORED = 1

      # The non-summary seeking query ignored case.
      #
      # Google skips the summary if the query is chit chat.
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_non_summary_seeking_query SummarySpec.ignore_non_summary_seeking_query}
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED = 2

      # The out-of-domain query ignored case.
      #
      # Google skips the summary if there are no high-relevance search results.
      # For example, the data store contains facts about company A but the
      # user query is asking questions about company B.
      OUT_OF_DOMAIN_QUERY_IGNORED = 3

      # The potential policy violation case.
      #
      # Google skips the summary if there is a potential policy violation
      # detected. This includes content that may be violent or toxic.
      POTENTIAL_POLICY_VIOLATION = 4

      # The LLM addon not enabled case.
      #
      # Google skips the summary if the LLM addon is not enabled.
      LLM_ADDON_NOT_ENABLED = 5

      # The no relevant content case.
      #
      # Google skips the summary if there is no relevant content in the
      # retrieved search results.
      NO_RELEVANT_CONTENT = 6

      # The jail-breaking query ignored case.
      #
      # For example, "Reply in the tone of a competing company's CEO".
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_jail_breaking_query]
      # is set to `true`.
      JAIL_BREAKING_QUERY_IGNORED = 7

      # The customer policy violation case.
      #
      # Google skips the summary if there is a customer policy violation
      # detected. The policy is defined by the customer.
      CUSTOMER_POLICY_VIOLATION = 8

      # The non-answer seeking query ignored case.
      #
      # Google skips the summary if the query doesn't have clear intent.
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_non_answer_seeking_query]
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED_V2 = 9

      # The time out case.
      #
      # Google skips the summary if the time out.
      TIME_OUT = 10
    end
  end

  # Information describing query expansion including whether expansion has
  # occurred.
  # @!attribute [rw] expanded_query
  #   @return [::Boolean]
  #     Bool describing whether query expansion has occurred.
  # @!attribute [rw] pinned_result_count
  #   @return [::Integer]
  #     Number of pinned results. This field will only be set when expansion
  #     happens and
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::QueryExpansionSpec#pin_unexpanded_results SearchRequest.QueryExpansionSpec.pin_unexpanded_results}
  #     is set to true.
  class QueryExpansionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Information describing what natural language understanding was
  # done on the input query.
  # @!attribute [rw] extracted_filters
  #   @return [::String]
  #     The filters that were extracted from the input query.
  # @!attribute [rw] rewritten_query
  #   @return [::String]
  #     Rewritten input query minus the extracted filters.
  # @!attribute [rw] classified_intents
  #   @return [::Array<::String>]
  #     The classified intents from the input query.
  # @!attribute [rw] structured_extracted_filter
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter]
  #     The filters that were extracted from the input query represented in a
  #     structured form.
  class NaturalLanguageQueryUnderstandingInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # The filters that were extracted from the input query represented in a
    # structured form.
    # @!attribute [rw] expression
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression]
    #     The expression denoting the filter that was extracted from the input
    #     query in a structured form. It can be a simple expression denoting a
    #     single string, numerical or geolocation constraint or a compound
    #     expression which is a combination of multiple expressions connected
    #     using logical (OR and AND) operators.
    class StructuredExtractedFilter
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Constraint expression of a string field.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the string field as defined in the schema.
      # @!attribute [rw] values
      #   @return [::Array<::String>]
      #     Values of the string field. The record will only be returned if the
      #     field value matches one of the values specified here.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class StringConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Constraint expression of a number field. Example: price < 100.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the numerical field as defined in the schema.
      # @!attribute [rw] comparison
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint::Comparison]
      #     The comparison operation performed between the field value and the
      #     value specified in the constraint.
      # @!attribute [rw] value
      #   @return [::Float]
      #     The value specified in the numerical constraint.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class NumberConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods

        # The comparison operation that was performed.
        module Comparison
          # Undefined comparison operator.
          COMPARISON_UNSPECIFIED = 0

          # Denotes equality `=` operator.
          EQUALS = 1

          # Denotes less than or equal to `<=` operator.
          LESS_THAN_EQUALS = 2

          # Denotes less than `<` operator.
          LESS_THAN = 3

          # Denotes greater than or equal to `>=` operator.
          GREATER_THAN_EQUALS = 4

          # Denotes greater than `>` operator.
          GREATER_THAN = 5
        end
      end

      # Constraint of a geolocation field.
      # Name of the geolocation field as defined in the schema.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     The name of the geolocation field as defined in the schema.
      # @!attribute [rw] address
      #   @return [::String]
      #     The reference address that was inferred from the input query. The
      #     proximity of the reference address to the geolocation field will be
      #     used to filter the results.
      # @!attribute [rw] latitude
      #   @return [::Float]
      #     The latitude of the geolocation inferred from the input query.
      # @!attribute [rw] longitude
      #   @return [::Float]
      #     The longitude of the geolocation inferred from the input query.
      # @!attribute [rw] radius_in_meters
      #   @return [::Float]
      #     The radius in meters around the address. The record is returned if
      #     the location of the geolocation field is within the radius.
      class GeolocationConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `And` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ANDed together.
      class AndExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `Or` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ORed together.
      class OrExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # The expression denoting the filter that was extracted from the input
      # query.
      # @!attribute [rw] string_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::StringConstraint]
      #     String constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] number_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint]
      #     Numerical constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `number_constraint`, `string_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] geolocation_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::GeolocationConstraint]
      #     Geolocation constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `geolocation_constraint`, `string_constraint`, `number_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] and_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::AndExpression]
      #     Logical "And" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `and_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] or_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::OrExpression]
      #     Logical "Or" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `or_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      class Expression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end
  end

  # Information about the session.
  # @!attribute [rw] name
  #   @return [::String]
  #     Name of the session.
  #     If the auto-session mode is used (when
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest#session SearchRequest.session}
  #     ends with "-"), this field holds the newly generated session name.
  # @!attribute [rw] query_id
  #   @return [::String]
  #     Query ID that corresponds to this search API call.
  #     One session can have multiple turns, each with a unique query ID.
  #
  #     By specifying the session name and this query ID in the Answer API call,
  #     the answer generation happens in the context of the search results from
  #     this search call.
  class SessionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Semantic state of the search response.
  module SemanticState
    # Default value. Should not be used.
    SEMANTIC_STATE_UNSPECIFIED = 0

    # Semantic search was disabled for this search response.
    DISABLED = 1

    # Semantic search was enabled for this search response.
    ENABLED = 2
  end
end

#results ⇒ ::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult>

Returns A list of matched documents. The order represents the ranking.

Returns:

• (::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult>) —

  A list of matched documents. The order represents the ranking.

# File 'proto_docs/google/cloud/discoveryengine/v1/search_service.rb', line 1419

class SearchResponse
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # Represents the search results.
  # @!attribute [rw] id
  #   @return [::String]
  #     {::Google::Cloud::DiscoveryEngine::V1::Document#id Document.id} of the
  #     searched {::Google::Cloud::DiscoveryEngine::V1::Document Document}.
  # @!attribute [rw] document
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Document]
  #     The document data snippet in the search response. Only fields that are
  #     marked as `retrievable` are populated.
  # @!attribute [rw] chunk
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Chunk]
  #     The chunk data in the search response if the
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec#search_result_mode SearchRequest.ContentSearchSpec.search_result_mode}
  #     is set to
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SearchResultMode::CHUNKS CHUNKS}.
  # @!attribute [r] model_scores
  #   @return [::Google::Protobuf::Map{::String => ::Google::Cloud::DiscoveryEngine::V1::DoubleList}]
  #     Output only. Google provided available scores.
  # @!attribute [rw] rank_signals
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals]
  #     Optional. A set of ranking signals associated with the result.
  class SearchResult
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A set of ranking signals.
    # @!attribute [rw] keyword_similarity_score
    #   @return [::Float]
    #     Optional. Keyword matching adjustment.
    # @!attribute [rw] relevance_score
    #   @return [::Float]
    #     Optional. Semantic relevance adjustment.
    # @!attribute [rw] semantic_similarity_score
    #   @return [::Float]
    #     Optional. Semantic similarity adjustment.
    # @!attribute [rw] pctr_rank
    #   @return [::Float]
    #     Optional. Predicted conversion rate adjustment as a rank.
    # @!attribute [rw] topicality_rank
    #   @return [::Float]
    #     Optional. Topicality adjustment as a rank.
    # @!attribute [rw] document_age
    #   @return [::Float]
    #     Optional. Age of the document in hours.
    # @!attribute [rw] boosting_factor
    #   @return [::Float]
    #     Optional. Combined custom boosts for a doc.
    # @!attribute [rw] default_rank
    #   @return [::Float]
    #     Optional. The default rank of the result.
    # @!attribute [rw] custom_signals
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals::CustomSignal>]
    #     Optional. A list of custom clearbox signals.
    class RankSignals
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Custom clearbox signal represented by name and value pair.
      # @!attribute [rw] name
      #   @return [::String]
      #     Optional. Name of the signal.
      # @!attribute [rw] value
      #   @return [::Float]
      #     Optional. Float value representing the ranking signal (e.g. 1.25 for
      #     BM25).
      class CustomSignal
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # @!attribute [rw] key
    #   @return [::String]
    # @!attribute [rw] value
    #   @return [::Google::Cloud::DiscoveryEngine::V1::DoubleList]
    class ModelScoresEntry
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # A facet result.
  # @!attribute [rw] key
  #   @return [::String]
  #     The key for this facet. For example, `"colors"` or `"price"`. It matches
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#key SearchRequest.FacetSpec.FacetKey.key}.
  # @!attribute [rw] values
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Facet::FacetValue>]
  #     The facet values for this field.
  # @!attribute [rw] dynamic_facet
  #   @return [::Boolean]
  #     Whether the facet is dynamically generated.
  class Facet
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A facet value which contains value names and their count.
    # @!attribute [rw] value
    #   @return [::String]
    #     Text value of a facet, such as "Black" for facet "colors".
    #
    #     Note: The following fields are mutually exclusive: `value`, `interval`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] interval
    #   @return [::Google::Cloud::DiscoveryEngine::V1::Interval]
    #     Interval value for a facet, such as [10, 20) for facet "price". It
    #     matches
    #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#intervals SearchRequest.FacetSpec.FacetKey.intervals}.
    #
    #     Note: The following fields are mutually exclusive: `interval`, `value`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] count
    #   @return [::Integer]
    #     Number of items that have this facet value.
    class FacetValue
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # Summary of the top N search results specified by the summary spec.
  # @!attribute [rw] summary_text
  #   @return [::String]
  #     The summary content.
  # @!attribute [rw] summary_skipped_reasons
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummarySkippedReason>]
  #     Additional summary-skipped reasons. This provides the reason for ignored
  #     cases. If nothing is skipped, this field is not set.
  # @!attribute [rw] safety_attributes
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SafetyAttributes]
  #     A collection of Safety Attribute categories and their associated
  #     confidence scores.
  # @!attribute [rw] summary_with_metadata
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummaryWithMetadata]
  #     Summary with metadata information.
  class Summary
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # Safety Attribute categories and their associated confidence scores.
    # @!attribute [rw] categories
    #   @return [::Array<::String>]
    #     The display names of Safety Attribute categories associated with the
    #     generated content. Order matches the Scores.
    # @!attribute [rw] scores
    #   @return [::Array<::Float>]
    #     The confidence scores of the each category, higher
    #     value means higher confidence. Order matches the Categories.
    class SafetyAttributes
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation metadata.
    # @!attribute [rw] citations
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Citation>]
    #     Citations for segments.
    class CitationMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation info for a segment.
    # @!attribute [rw] start_index
    #   @return [::Integer]
    #     Index indicates the start of the segment, measured in bytes/unicode.
    # @!attribute [rw] end_index
    #   @return [::Integer]
    #     End of the attributed segment, exclusive.
    # @!attribute [rw] sources
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationSource>]
    #     Citation sources for the attributed segment.
    class Citation
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation source.
    # @!attribute [rw] reference_index
    #   @return [::Integer]
    #     Document reference index from SummaryWithMetadata.references.
    #     It is 0-indexed and the value will be zero if the reference_index is
    #     not set explicitly.
    class CitationSource
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Document reference.
    # @!attribute [rw] title
    #   @return [::String]
    #     Title of the document.
    # @!attribute [rw] document
    #   @return [::String]
    #     Required.
    #     {::Google::Cloud::DiscoveryEngine::V1::Document#name Document.name} of the
    #     document. Full resource name of the referenced document, in the format
    #     `projects/*/locations/*/collections/*/dataStores/*/branches/*/documents/*`.
    # @!attribute [rw] uri
    #   @return [::String]
    #     Cloud Storage or HTTP uri for the document.
    # @!attribute [rw] chunk_contents
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference::ChunkContent>]
    #     List of cited chunk contents derived from document content.
    class Reference
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Chunk content.
      # @!attribute [rw] content
      #   @return [::String]
      #     Chunk textual content.
      # @!attribute [rw] page_identifier
      #   @return [::String]
      #     Page identifier.
      class ChunkContent
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # Summary with metadata information.
    # @!attribute [rw] summary
    #   @return [::String]
    #     Summary text with no citation information.
    # @!attribute [rw] citation_metadata
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationMetadata]
    #     Citation metadata for given summary.
    # @!attribute [rw] references
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference>]
    #     Document References.
    class SummaryWithMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # An Enum for summary-skipped reasons.
    module SummarySkippedReason
      # Default value. The summary skipped reason is not specified.
      SUMMARY_SKIPPED_REASON_UNSPECIFIED = 0

      # The adversarial query ignored case.
      #
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_adversarial_query SummarySpec.ignore_adversarial_query}
      # is set to `true`.
      ADVERSARIAL_QUERY_IGNORED = 1

      # The non-summary seeking query ignored case.
      #
      # Google skips the summary if the query is chit chat.
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_non_summary_seeking_query SummarySpec.ignore_non_summary_seeking_query}
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED = 2

      # The out-of-domain query ignored case.
      #
      # Google skips the summary if there are no high-relevance search results.
      # For example, the data store contains facts about company A but the
      # user query is asking questions about company B.
      OUT_OF_DOMAIN_QUERY_IGNORED = 3

      # The potential policy violation case.
      #
      # Google skips the summary if there is a potential policy violation
      # detected. This includes content that may be violent or toxic.
      POTENTIAL_POLICY_VIOLATION = 4

      # The LLM addon not enabled case.
      #
      # Google skips the summary if the LLM addon is not enabled.
      LLM_ADDON_NOT_ENABLED = 5

      # The no relevant content case.
      #
      # Google skips the summary if there is no relevant content in the
      # retrieved search results.
      NO_RELEVANT_CONTENT = 6

      # The jail-breaking query ignored case.
      #
      # For example, "Reply in the tone of a competing company's CEO".
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_jail_breaking_query]
      # is set to `true`.
      JAIL_BREAKING_QUERY_IGNORED = 7

      # The customer policy violation case.
      #
      # Google skips the summary if there is a customer policy violation
      # detected. The policy is defined by the customer.
      CUSTOMER_POLICY_VIOLATION = 8

      # The non-answer seeking query ignored case.
      #
      # Google skips the summary if the query doesn't have clear intent.
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_non_answer_seeking_query]
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED_V2 = 9

      # The time out case.
      #
      # Google skips the summary if the time out.
      TIME_OUT = 10
    end
  end

  # Information describing query expansion including whether expansion has
  # occurred.
  # @!attribute [rw] expanded_query
  #   @return [::Boolean]
  #     Bool describing whether query expansion has occurred.
  # @!attribute [rw] pinned_result_count
  #   @return [::Integer]
  #     Number of pinned results. This field will only be set when expansion
  #     happens and
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::QueryExpansionSpec#pin_unexpanded_results SearchRequest.QueryExpansionSpec.pin_unexpanded_results}
  #     is set to true.
  class QueryExpansionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Information describing what natural language understanding was
  # done on the input query.
  # @!attribute [rw] extracted_filters
  #   @return [::String]
  #     The filters that were extracted from the input query.
  # @!attribute [rw] rewritten_query
  #   @return [::String]
  #     Rewritten input query minus the extracted filters.
  # @!attribute [rw] classified_intents
  #   @return [::Array<::String>]
  #     The classified intents from the input query.
  # @!attribute [rw] structured_extracted_filter
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter]
  #     The filters that were extracted from the input query represented in a
  #     structured form.
  class NaturalLanguageQueryUnderstandingInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # The filters that were extracted from the input query represented in a
    # structured form.
    # @!attribute [rw] expression
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression]
    #     The expression denoting the filter that was extracted from the input
    #     query in a structured form. It can be a simple expression denoting a
    #     single string, numerical or geolocation constraint or a compound
    #     expression which is a combination of multiple expressions connected
    #     using logical (OR and AND) operators.
    class StructuredExtractedFilter
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Constraint expression of a string field.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the string field as defined in the schema.
      # @!attribute [rw] values
      #   @return [::Array<::String>]
      #     Values of the string field. The record will only be returned if the
      #     field value matches one of the values specified here.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class StringConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Constraint expression of a number field. Example: price < 100.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the numerical field as defined in the schema.
      # @!attribute [rw] comparison
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint::Comparison]
      #     The comparison operation performed between the field value and the
      #     value specified in the constraint.
      # @!attribute [rw] value
      #   @return [::Float]
      #     The value specified in the numerical constraint.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class NumberConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods

        # The comparison operation that was performed.
        module Comparison
          # Undefined comparison operator.
          COMPARISON_UNSPECIFIED = 0

          # Denotes equality `=` operator.
          EQUALS = 1

          # Denotes less than or equal to `<=` operator.
          LESS_THAN_EQUALS = 2

          # Denotes less than `<` operator.
          LESS_THAN = 3

          # Denotes greater than or equal to `>=` operator.
          GREATER_THAN_EQUALS = 4

          # Denotes greater than `>` operator.
          GREATER_THAN = 5
        end
      end

      # Constraint of a geolocation field.
      # Name of the geolocation field as defined in the schema.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     The name of the geolocation field as defined in the schema.
      # @!attribute [rw] address
      #   @return [::String]
      #     The reference address that was inferred from the input query. The
      #     proximity of the reference address to the geolocation field will be
      #     used to filter the results.
      # @!attribute [rw] latitude
      #   @return [::Float]
      #     The latitude of the geolocation inferred from the input query.
      # @!attribute [rw] longitude
      #   @return [::Float]
      #     The longitude of the geolocation inferred from the input query.
      # @!attribute [rw] radius_in_meters
      #   @return [::Float]
      #     The radius in meters around the address. The record is returned if
      #     the location of the geolocation field is within the radius.
      class GeolocationConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `And` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ANDed together.
      class AndExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `Or` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ORed together.
      class OrExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # The expression denoting the filter that was extracted from the input
      # query.
      # @!attribute [rw] string_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::StringConstraint]
      #     String constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] number_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint]
      #     Numerical constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `number_constraint`, `string_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] geolocation_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::GeolocationConstraint]
      #     Geolocation constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `geolocation_constraint`, `string_constraint`, `number_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] and_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::AndExpression]
      #     Logical "And" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `and_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] or_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::OrExpression]
      #     Logical "Or" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `or_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      class Expression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end
  end

  # Information about the session.
  # @!attribute [rw] name
  #   @return [::String]
  #     Name of the session.
  #     If the auto-session mode is used (when
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest#session SearchRequest.session}
  #     ends with "-"), this field holds the newly generated session name.
  # @!attribute [rw] query_id
  #   @return [::String]
  #     Query ID that corresponds to this search API call.
  #     One session can have multiple turns, each with a unique query ID.
  #
  #     By specifying the session name and this query ID in the Answer API call,
  #     the answer generation happens in the context of the search results from
  #     this search call.
  class SessionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Semantic state of the search response.
  module SemanticState
    # Default value. Should not be used.
    SEMANTIC_STATE_UNSPECIFIED = 0

    # Semantic search was disabled for this search response.
    DISABLED = 1

    # Semantic search was enabled for this search response.
    ENABLED = 2
  end
end

#search_link_promotions ⇒ ::Array<::Google::Cloud::DiscoveryEngine::V1::SearchLinkPromotion>

Returns Promotions for site search.

Returns:

• (::Array<::Google::Cloud::DiscoveryEngine::V1::SearchLinkPromotion>) —

  Promotions for site search.

# File 'proto_docs/google/cloud/discoveryengine/v1/search_service.rb', line 1419

class SearchResponse
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # Represents the search results.
  # @!attribute [rw] id
  #   @return [::String]
  #     {::Google::Cloud::DiscoveryEngine::V1::Document#id Document.id} of the
  #     searched {::Google::Cloud::DiscoveryEngine::V1::Document Document}.
  # @!attribute [rw] document
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Document]
  #     The document data snippet in the search response. Only fields that are
  #     marked as `retrievable` are populated.
  # @!attribute [rw] chunk
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Chunk]
  #     The chunk data in the search response if the
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec#search_result_mode SearchRequest.ContentSearchSpec.search_result_mode}
  #     is set to
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SearchResultMode::CHUNKS CHUNKS}.
  # @!attribute [r] model_scores
  #   @return [::Google::Protobuf::Map{::String => ::Google::Cloud::DiscoveryEngine::V1::DoubleList}]
  #     Output only. Google provided available scores.
  # @!attribute [rw] rank_signals
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals]
  #     Optional. A set of ranking signals associated with the result.
  class SearchResult
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A set of ranking signals.
    # @!attribute [rw] keyword_similarity_score
    #   @return [::Float]
    #     Optional. Keyword matching adjustment.
    # @!attribute [rw] relevance_score
    #   @return [::Float]
    #     Optional. Semantic relevance adjustment.
    # @!attribute [rw] semantic_similarity_score
    #   @return [::Float]
    #     Optional. Semantic similarity adjustment.
    # @!attribute [rw] pctr_rank
    #   @return [::Float]
    #     Optional. Predicted conversion rate adjustment as a rank.
    # @!attribute [rw] topicality_rank
    #   @return [::Float]
    #     Optional. Topicality adjustment as a rank.
    # @!attribute [rw] document_age
    #   @return [::Float]
    #     Optional. Age of the document in hours.
    # @!attribute [rw] boosting_factor
    #   @return [::Float]
    #     Optional. Combined custom boosts for a doc.
    # @!attribute [rw] default_rank
    #   @return [::Float]
    #     Optional. The default rank of the result.
    # @!attribute [rw] custom_signals
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals::CustomSignal>]
    #     Optional. A list of custom clearbox signals.
    class RankSignals
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Custom clearbox signal represented by name and value pair.
      # @!attribute [rw] name
      #   @return [::String]
      #     Optional. Name of the signal.
      # @!attribute [rw] value
      #   @return [::Float]
      #     Optional. Float value representing the ranking signal (e.g. 1.25 for
      #     BM25).
      class CustomSignal
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # @!attribute [rw] key
    #   @return [::String]
    # @!attribute [rw] value
    #   @return [::Google::Cloud::DiscoveryEngine::V1::DoubleList]
    class ModelScoresEntry
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # A facet result.
  # @!attribute [rw] key
  #   @return [::String]
  #     The key for this facet. For example, `"colors"` or `"price"`. It matches
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#key SearchRequest.FacetSpec.FacetKey.key}.
  # @!attribute [rw] values
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Facet::FacetValue>]
  #     The facet values for this field.
  # @!attribute [rw] dynamic_facet
  #   @return [::Boolean]
  #     Whether the facet is dynamically generated.
  class Facet
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A facet value which contains value names and their count.
    # @!attribute [rw] value
    #   @return [::String]
    #     Text value of a facet, such as "Black" for facet "colors".
    #
    #     Note: The following fields are mutually exclusive: `value`, `interval`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] interval
    #   @return [::Google::Cloud::DiscoveryEngine::V1::Interval]
    #     Interval value for a facet, such as [10, 20) for facet "price". It
    #     matches
    #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#intervals SearchRequest.FacetSpec.FacetKey.intervals}.
    #
    #     Note: The following fields are mutually exclusive: `interval`, `value`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] count
    #   @return [::Integer]
    #     Number of items that have this facet value.
    class FacetValue
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # Summary of the top N search results specified by the summary spec.
  # @!attribute [rw] summary_text
  #   @return [::String]
  #     The summary content.
  # @!attribute [rw] summary_skipped_reasons
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummarySkippedReason>]
  #     Additional summary-skipped reasons. This provides the reason for ignored
  #     cases. If nothing is skipped, this field is not set.
  # @!attribute [rw] safety_attributes
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SafetyAttributes]
  #     A collection of Safety Attribute categories and their associated
  #     confidence scores.
  # @!attribute [rw] summary_with_metadata
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummaryWithMetadata]
  #     Summary with metadata information.
  class Summary
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # Safety Attribute categories and their associated confidence scores.
    # @!attribute [rw] categories
    #   @return [::Array<::String>]
    #     The display names of Safety Attribute categories associated with the
    #     generated content. Order matches the Scores.
    # @!attribute [rw] scores
    #   @return [::Array<::Float>]
    #     The confidence scores of the each category, higher
    #     value means higher confidence. Order matches the Categories.
    class SafetyAttributes
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation metadata.
    # @!attribute [rw] citations
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Citation>]
    #     Citations for segments.
    class CitationMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation info for a segment.
    # @!attribute [rw] start_index
    #   @return [::Integer]
    #     Index indicates the start of the segment, measured in bytes/unicode.
    # @!attribute [rw] end_index
    #   @return [::Integer]
    #     End of the attributed segment, exclusive.
    # @!attribute [rw] sources
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationSource>]
    #     Citation sources for the attributed segment.
    class Citation
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation source.
    # @!attribute [rw] reference_index
    #   @return [::Integer]
    #     Document reference index from SummaryWithMetadata.references.
    #     It is 0-indexed and the value will be zero if the reference_index is
    #     not set explicitly.
    class CitationSource
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Document reference.
    # @!attribute [rw] title
    #   @return [::String]
    #     Title of the document.
    # @!attribute [rw] document
    #   @return [::String]
    #     Required.
    #     {::Google::Cloud::DiscoveryEngine::V1::Document#name Document.name} of the
    #     document. Full resource name of the referenced document, in the format
    #     `projects/*/locations/*/collections/*/dataStores/*/branches/*/documents/*`.
    # @!attribute [rw] uri
    #   @return [::String]
    #     Cloud Storage or HTTP uri for the document.
    # @!attribute [rw] chunk_contents
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference::ChunkContent>]
    #     List of cited chunk contents derived from document content.
    class Reference
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Chunk content.
      # @!attribute [rw] content
      #   @return [::String]
      #     Chunk textual content.
      # @!attribute [rw] page_identifier
      #   @return [::String]
      #     Page identifier.
      class ChunkContent
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # Summary with metadata information.
    # @!attribute [rw] summary
    #   @return [::String]
    #     Summary text with no citation information.
    # @!attribute [rw] citation_metadata
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationMetadata]
    #     Citation metadata for given summary.
    # @!attribute [rw] references
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference>]
    #     Document References.
    class SummaryWithMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # An Enum for summary-skipped reasons.
    module SummarySkippedReason
      # Default value. The summary skipped reason is not specified.
      SUMMARY_SKIPPED_REASON_UNSPECIFIED = 0

      # The adversarial query ignored case.
      #
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_adversarial_query SummarySpec.ignore_adversarial_query}
      # is set to `true`.
      ADVERSARIAL_QUERY_IGNORED = 1

      # The non-summary seeking query ignored case.
      #
      # Google skips the summary if the query is chit chat.
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_non_summary_seeking_query SummarySpec.ignore_non_summary_seeking_query}
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED = 2

      # The out-of-domain query ignored case.
      #
      # Google skips the summary if there are no high-relevance search results.
      # For example, the data store contains facts about company A but the
      # user query is asking questions about company B.
      OUT_OF_DOMAIN_QUERY_IGNORED = 3

      # The potential policy violation case.
      #
      # Google skips the summary if there is a potential policy violation
      # detected. This includes content that may be violent or toxic.
      POTENTIAL_POLICY_VIOLATION = 4

      # The LLM addon not enabled case.
      #
      # Google skips the summary if the LLM addon is not enabled.
      LLM_ADDON_NOT_ENABLED = 5

      # The no relevant content case.
      #
      # Google skips the summary if there is no relevant content in the
      # retrieved search results.
      NO_RELEVANT_CONTENT = 6

      # The jail-breaking query ignored case.
      #
      # For example, "Reply in the tone of a competing company's CEO".
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_jail_breaking_query]
      # is set to `true`.
      JAIL_BREAKING_QUERY_IGNORED = 7

      # The customer policy violation case.
      #
      # Google skips the summary if there is a customer policy violation
      # detected. The policy is defined by the customer.
      CUSTOMER_POLICY_VIOLATION = 8

      # The non-answer seeking query ignored case.
      #
      # Google skips the summary if the query doesn't have clear intent.
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_non_answer_seeking_query]
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED_V2 = 9

      # The time out case.
      #
      # Google skips the summary if the time out.
      TIME_OUT = 10
    end
  end

  # Information describing query expansion including whether expansion has
  # occurred.
  # @!attribute [rw] expanded_query
  #   @return [::Boolean]
  #     Bool describing whether query expansion has occurred.
  # @!attribute [rw] pinned_result_count
  #   @return [::Integer]
  #     Number of pinned results. This field will only be set when expansion
  #     happens and
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::QueryExpansionSpec#pin_unexpanded_results SearchRequest.QueryExpansionSpec.pin_unexpanded_results}
  #     is set to true.
  class QueryExpansionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Information describing what natural language understanding was
  # done on the input query.
  # @!attribute [rw] extracted_filters
  #   @return [::String]
  #     The filters that were extracted from the input query.
  # @!attribute [rw] rewritten_query
  #   @return [::String]
  #     Rewritten input query minus the extracted filters.
  # @!attribute [rw] classified_intents
  #   @return [::Array<::String>]
  #     The classified intents from the input query.
  # @!attribute [rw] structured_extracted_filter
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter]
  #     The filters that were extracted from the input query represented in a
  #     structured form.
  class NaturalLanguageQueryUnderstandingInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # The filters that were extracted from the input query represented in a
    # structured form.
    # @!attribute [rw] expression
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression]
    #     The expression denoting the filter that was extracted from the input
    #     query in a structured form. It can be a simple expression denoting a
    #     single string, numerical or geolocation constraint or a compound
    #     expression which is a combination of multiple expressions connected
    #     using logical (OR and AND) operators.
    class StructuredExtractedFilter
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Constraint expression of a string field.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the string field as defined in the schema.
      # @!attribute [rw] values
      #   @return [::Array<::String>]
      #     Values of the string field. The record will only be returned if the
      #     field value matches one of the values specified here.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class StringConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Constraint expression of a number field. Example: price < 100.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the numerical field as defined in the schema.
      # @!attribute [rw] comparison
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint::Comparison]
      #     The comparison operation performed between the field value and the
      #     value specified in the constraint.
      # @!attribute [rw] value
      #   @return [::Float]
      #     The value specified in the numerical constraint.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class NumberConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods

        # The comparison operation that was performed.
        module Comparison
          # Undefined comparison operator.
          COMPARISON_UNSPECIFIED = 0

          # Denotes equality `=` operator.
          EQUALS = 1

          # Denotes less than or equal to `<=` operator.
          LESS_THAN_EQUALS = 2

          # Denotes less than `<` operator.
          LESS_THAN = 3

          # Denotes greater than or equal to `>=` operator.
          GREATER_THAN_EQUALS = 4

          # Denotes greater than `>` operator.
          GREATER_THAN = 5
        end
      end

      # Constraint of a geolocation field.
      # Name of the geolocation field as defined in the schema.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     The name of the geolocation field as defined in the schema.
      # @!attribute [rw] address
      #   @return [::String]
      #     The reference address that was inferred from the input query. The
      #     proximity of the reference address to the geolocation field will be
      #     used to filter the results.
      # @!attribute [rw] latitude
      #   @return [::Float]
      #     The latitude of the geolocation inferred from the input query.
      # @!attribute [rw] longitude
      #   @return [::Float]
      #     The longitude of the geolocation inferred from the input query.
      # @!attribute [rw] radius_in_meters
      #   @return [::Float]
      #     The radius in meters around the address. The record is returned if
      #     the location of the geolocation field is within the radius.
      class GeolocationConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `And` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ANDed together.
      class AndExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `Or` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ORed together.
      class OrExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # The expression denoting the filter that was extracted from the input
      # query.
      # @!attribute [rw] string_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::StringConstraint]
      #     String constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] number_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint]
      #     Numerical constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `number_constraint`, `string_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] geolocation_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::GeolocationConstraint]
      #     Geolocation constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `geolocation_constraint`, `string_constraint`, `number_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] and_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::AndExpression]
      #     Logical "And" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `and_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] or_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::OrExpression]
      #     Logical "Or" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `or_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      class Expression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end
  end

  # Information about the session.
  # @!attribute [rw] name
  #   @return [::String]
  #     Name of the session.
  #     If the auto-session mode is used (when
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest#session SearchRequest.session}
  #     ends with "-"), this field holds the newly generated session name.
  # @!attribute [rw] query_id
  #   @return [::String]
  #     Query ID that corresponds to this search API call.
  #     One session can have multiple turns, each with a unique query ID.
  #
  #     By specifying the session name and this query ID in the Answer API call,
  #     the answer generation happens in the context of the search results from
  #     this search call.
  class SessionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Semantic state of the search response.
  module SemanticState
    # Default value. Should not be used.
    SEMANTIC_STATE_UNSPECIFIED = 0

    # Semantic search was disabled for this search response.
    DISABLED = 1

    # Semantic search was enabled for this search response.
    ENABLED = 2
  end
end

#semantic_state ⇒ ::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SemanticState (readonly)

Returns Output only. Indicates the semantic state of the search response.

Returns:

• (::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SemanticState) —

  Output only. Indicates the semantic state of the search response.

# File 'proto_docs/google/cloud/discoveryengine/v1/search_service.rb', line 1419

class SearchResponse
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # Represents the search results.
  # @!attribute [rw] id
  #   @return [::String]
  #     {::Google::Cloud::DiscoveryEngine::V1::Document#id Document.id} of the
  #     searched {::Google::Cloud::DiscoveryEngine::V1::Document Document}.
  # @!attribute [rw] document
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Document]
  #     The document data snippet in the search response. Only fields that are
  #     marked as `retrievable` are populated.
  # @!attribute [rw] chunk
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Chunk]
  #     The chunk data in the search response if the
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec#search_result_mode SearchRequest.ContentSearchSpec.search_result_mode}
  #     is set to
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SearchResultMode::CHUNKS CHUNKS}.
  # @!attribute [r] model_scores
  #   @return [::Google::Protobuf::Map{::String => ::Google::Cloud::DiscoveryEngine::V1::DoubleList}]
  #     Output only. Google provided available scores.
  # @!attribute [rw] rank_signals
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals]
  #     Optional. A set of ranking signals associated with the result.
  class SearchResult
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A set of ranking signals.
    # @!attribute [rw] keyword_similarity_score
    #   @return [::Float]
    #     Optional. Keyword matching adjustment.
    # @!attribute [rw] relevance_score
    #   @return [::Float]
    #     Optional. Semantic relevance adjustment.
    # @!attribute [rw] semantic_similarity_score
    #   @return [::Float]
    #     Optional. Semantic similarity adjustment.
    # @!attribute [rw] pctr_rank
    #   @return [::Float]
    #     Optional. Predicted conversion rate adjustment as a rank.
    # @!attribute [rw] topicality_rank
    #   @return [::Float]
    #     Optional. Topicality adjustment as a rank.
    # @!attribute [rw] document_age
    #   @return [::Float]
    #     Optional. Age of the document in hours.
    # @!attribute [rw] boosting_factor
    #   @return [::Float]
    #     Optional. Combined custom boosts for a doc.
    # @!attribute [rw] default_rank
    #   @return [::Float]
    #     Optional. The default rank of the result.
    # @!attribute [rw] custom_signals
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals::CustomSignal>]
    #     Optional. A list of custom clearbox signals.
    class RankSignals
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Custom clearbox signal represented by name and value pair.
      # @!attribute [rw] name
      #   @return [::String]
      #     Optional. Name of the signal.
      # @!attribute [rw] value
      #   @return [::Float]
      #     Optional. Float value representing the ranking signal (e.g. 1.25 for
      #     BM25).
      class CustomSignal
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # @!attribute [rw] key
    #   @return [::String]
    # @!attribute [rw] value
    #   @return [::Google::Cloud::DiscoveryEngine::V1::DoubleList]
    class ModelScoresEntry
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # A facet result.
  # @!attribute [rw] key
  #   @return [::String]
  #     The key for this facet. For example, `"colors"` or `"price"`. It matches
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#key SearchRequest.FacetSpec.FacetKey.key}.
  # @!attribute [rw] values
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Facet::FacetValue>]
  #     The facet values for this field.
  # @!attribute [rw] dynamic_facet
  #   @return [::Boolean]
  #     Whether the facet is dynamically generated.
  class Facet
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A facet value which contains value names and their count.
    # @!attribute [rw] value
    #   @return [::String]
    #     Text value of a facet, such as "Black" for facet "colors".
    #
    #     Note: The following fields are mutually exclusive: `value`, `interval`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] interval
    #   @return [::Google::Cloud::DiscoveryEngine::V1::Interval]
    #     Interval value for a facet, such as [10, 20) for facet "price". It
    #     matches
    #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#intervals SearchRequest.FacetSpec.FacetKey.intervals}.
    #
    #     Note: The following fields are mutually exclusive: `interval`, `value`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] count
    #   @return [::Integer]
    #     Number of items that have this facet value.
    class FacetValue
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # Summary of the top N search results specified by the summary spec.
  # @!attribute [rw] summary_text
  #   @return [::String]
  #     The summary content.
  # @!attribute [rw] summary_skipped_reasons
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummarySkippedReason>]
  #     Additional summary-skipped reasons. This provides the reason for ignored
  #     cases. If nothing is skipped, this field is not set.
  # @!attribute [rw] safety_attributes
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SafetyAttributes]
  #     A collection of Safety Attribute categories and their associated
  #     confidence scores.
  # @!attribute [rw] summary_with_metadata
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummaryWithMetadata]
  #     Summary with metadata information.
  class Summary
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # Safety Attribute categories and their associated confidence scores.
    # @!attribute [rw] categories
    #   @return [::Array<::String>]
    #     The display names of Safety Attribute categories associated with the
    #     generated content. Order matches the Scores.
    # @!attribute [rw] scores
    #   @return [::Array<::Float>]
    #     The confidence scores of the each category, higher
    #     value means higher confidence. Order matches the Categories.
    class SafetyAttributes
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation metadata.
    # @!attribute [rw] citations
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Citation>]
    #     Citations for segments.
    class CitationMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation info for a segment.
    # @!attribute [rw] start_index
    #   @return [::Integer]
    #     Index indicates the start of the segment, measured in bytes/unicode.
    # @!attribute [rw] end_index
    #   @return [::Integer]
    #     End of the attributed segment, exclusive.
    # @!attribute [rw] sources
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationSource>]
    #     Citation sources for the attributed segment.
    class Citation
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation source.
    # @!attribute [rw] reference_index
    #   @return [::Integer]
    #     Document reference index from SummaryWithMetadata.references.
    #     It is 0-indexed and the value will be zero if the reference_index is
    #     not set explicitly.
    class CitationSource
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Document reference.
    # @!attribute [rw] title
    #   @return [::String]
    #     Title of the document.
    # @!attribute [rw] document
    #   @return [::String]
    #     Required.
    #     {::Google::Cloud::DiscoveryEngine::V1::Document#name Document.name} of the
    #     document. Full resource name of the referenced document, in the format
    #     `projects/*/locations/*/collections/*/dataStores/*/branches/*/documents/*`.
    # @!attribute [rw] uri
    #   @return [::String]
    #     Cloud Storage or HTTP uri for the document.
    # @!attribute [rw] chunk_contents
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference::ChunkContent>]
    #     List of cited chunk contents derived from document content.
    class Reference
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Chunk content.
      # @!attribute [rw] content
      #   @return [::String]
      #     Chunk textual content.
      # @!attribute [rw] page_identifier
      #   @return [::String]
      #     Page identifier.
      class ChunkContent
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # Summary with metadata information.
    # @!attribute [rw] summary
    #   @return [::String]
    #     Summary text with no citation information.
    # @!attribute [rw] citation_metadata
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationMetadata]
    #     Citation metadata for given summary.
    # @!attribute [rw] references
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference>]
    #     Document References.
    class SummaryWithMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # An Enum for summary-skipped reasons.
    module SummarySkippedReason
      # Default value. The summary skipped reason is not specified.
      SUMMARY_SKIPPED_REASON_UNSPECIFIED = 0

      # The adversarial query ignored case.
      #
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_adversarial_query SummarySpec.ignore_adversarial_query}
      # is set to `true`.
      ADVERSARIAL_QUERY_IGNORED = 1

      # The non-summary seeking query ignored case.
      #
      # Google skips the summary if the query is chit chat.
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_non_summary_seeking_query SummarySpec.ignore_non_summary_seeking_query}
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED = 2

      # The out-of-domain query ignored case.
      #
      # Google skips the summary if there are no high-relevance search results.
      # For example, the data store contains facts about company A but the
      # user query is asking questions about company B.
      OUT_OF_DOMAIN_QUERY_IGNORED = 3

      # The potential policy violation case.
      #
      # Google skips the summary if there is a potential policy violation
      # detected. This includes content that may be violent or toxic.
      POTENTIAL_POLICY_VIOLATION = 4

      # The LLM addon not enabled case.
      #
      # Google skips the summary if the LLM addon is not enabled.
      LLM_ADDON_NOT_ENABLED = 5

      # The no relevant content case.
      #
      # Google skips the summary if there is no relevant content in the
      # retrieved search results.
      NO_RELEVANT_CONTENT = 6

      # The jail-breaking query ignored case.
      #
      # For example, "Reply in the tone of a competing company's CEO".
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_jail_breaking_query]
      # is set to `true`.
      JAIL_BREAKING_QUERY_IGNORED = 7

      # The customer policy violation case.
      #
      # Google skips the summary if there is a customer policy violation
      # detected. The policy is defined by the customer.
      CUSTOMER_POLICY_VIOLATION = 8

      # The non-answer seeking query ignored case.
      #
      # Google skips the summary if the query doesn't have clear intent.
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_non_answer_seeking_query]
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED_V2 = 9

      # The time out case.
      #
      # Google skips the summary if the time out.
      TIME_OUT = 10
    end
  end

  # Information describing query expansion including whether expansion has
  # occurred.
  # @!attribute [rw] expanded_query
  #   @return [::Boolean]
  #     Bool describing whether query expansion has occurred.
  # @!attribute [rw] pinned_result_count
  #   @return [::Integer]
  #     Number of pinned results. This field will only be set when expansion
  #     happens and
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::QueryExpansionSpec#pin_unexpanded_results SearchRequest.QueryExpansionSpec.pin_unexpanded_results}
  #     is set to true.
  class QueryExpansionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Information describing what natural language understanding was
  # done on the input query.
  # @!attribute [rw] extracted_filters
  #   @return [::String]
  #     The filters that were extracted from the input query.
  # @!attribute [rw] rewritten_query
  #   @return [::String]
  #     Rewritten input query minus the extracted filters.
  # @!attribute [rw] classified_intents
  #   @return [::Array<::String>]
  #     The classified intents from the input query.
  # @!attribute [rw] structured_extracted_filter
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter]
  #     The filters that were extracted from the input query represented in a
  #     structured form.
  class NaturalLanguageQueryUnderstandingInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # The filters that were extracted from the input query represented in a
    # structured form.
    # @!attribute [rw] expression
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression]
    #     The expression denoting the filter that was extracted from the input
    #     query in a structured form. It can be a simple expression denoting a
    #     single string, numerical or geolocation constraint or a compound
    #     expression which is a combination of multiple expressions connected
    #     using logical (OR and AND) operators.
    class StructuredExtractedFilter
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Constraint expression of a string field.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the string field as defined in the schema.
      # @!attribute [rw] values
      #   @return [::Array<::String>]
      #     Values of the string field. The record will only be returned if the
      #     field value matches one of the values specified here.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class StringConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Constraint expression of a number field. Example: price < 100.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the numerical field as defined in the schema.
      # @!attribute [rw] comparison
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint::Comparison]
      #     The comparison operation performed between the field value and the
      #     value specified in the constraint.
      # @!attribute [rw] value
      #   @return [::Float]
      #     The value specified in the numerical constraint.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class NumberConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods

        # The comparison operation that was performed.
        module Comparison
          # Undefined comparison operator.
          COMPARISON_UNSPECIFIED = 0

          # Denotes equality `=` operator.
          EQUALS = 1

          # Denotes less than or equal to `<=` operator.
          LESS_THAN_EQUALS = 2

          # Denotes less than `<` operator.
          LESS_THAN = 3

          # Denotes greater than or equal to `>=` operator.
          GREATER_THAN_EQUALS = 4

          # Denotes greater than `>` operator.
          GREATER_THAN = 5
        end
      end

      # Constraint of a geolocation field.
      # Name of the geolocation field as defined in the schema.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     The name of the geolocation field as defined in the schema.
      # @!attribute [rw] address
      #   @return [::String]
      #     The reference address that was inferred from the input query. The
      #     proximity of the reference address to the geolocation field will be
      #     used to filter the results.
      # @!attribute [rw] latitude
      #   @return [::Float]
      #     The latitude of the geolocation inferred from the input query.
      # @!attribute [rw] longitude
      #   @return [::Float]
      #     The longitude of the geolocation inferred from the input query.
      # @!attribute [rw] radius_in_meters
      #   @return [::Float]
      #     The radius in meters around the address. The record is returned if
      #     the location of the geolocation field is within the radius.
      class GeolocationConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `And` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ANDed together.
      class AndExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `Or` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ORed together.
      class OrExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # The expression denoting the filter that was extracted from the input
      # query.
      # @!attribute [rw] string_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::StringConstraint]
      #     String constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] number_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint]
      #     Numerical constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `number_constraint`, `string_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] geolocation_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::GeolocationConstraint]
      #     Geolocation constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `geolocation_constraint`, `string_constraint`, `number_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] and_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::AndExpression]
      #     Logical "And" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `and_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] or_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::OrExpression]
      #     Logical "Or" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `or_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      class Expression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end
  end

  # Information about the session.
  # @!attribute [rw] name
  #   @return [::String]
  #     Name of the session.
  #     If the auto-session mode is used (when
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest#session SearchRequest.session}
  #     ends with "-"), this field holds the newly generated session name.
  # @!attribute [rw] query_id
  #   @return [::String]
  #     Query ID that corresponds to this search API call.
  #     One session can have multiple turns, each with a unique query ID.
  #
  #     By specifying the session name and this query ID in the Answer API call,
  #     the answer generation happens in the context of the search results from
  #     this search call.
  class SessionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Semantic state of the search response.
  module SemanticState
    # Default value. Should not be used.
    SEMANTIC_STATE_UNSPECIFIED = 0

    # Semantic search was disabled for this search response.
    DISABLED = 1

    # Semantic search was enabled for this search response.
    ENABLED = 2
  end
end

#session_info ⇒ ::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SessionInfo

Returns Session information.

Only set if SearchRequest.session is provided. See its description for more details.

Returns:

• (::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SessionInfo) —

  Session information.

  Only set if SearchRequest.session is provided. See its description for more details.

# File 'proto_docs/google/cloud/discoveryengine/v1/search_service.rb', line 1419

class SearchResponse
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # Represents the search results.
  # @!attribute [rw] id
  #   @return [::String]
  #     {::Google::Cloud::DiscoveryEngine::V1::Document#id Document.id} of the
  #     searched {::Google::Cloud::DiscoveryEngine::V1::Document Document}.
  # @!attribute [rw] document
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Document]
  #     The document data snippet in the search response. Only fields that are
  #     marked as `retrievable` are populated.
  # @!attribute [rw] chunk
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Chunk]
  #     The chunk data in the search response if the
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec#search_result_mode SearchRequest.ContentSearchSpec.search_result_mode}
  #     is set to
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SearchResultMode::CHUNKS CHUNKS}.
  # @!attribute [r] model_scores
  #   @return [::Google::Protobuf::Map{::String => ::Google::Cloud::DiscoveryEngine::V1::DoubleList}]
  #     Output only. Google provided available scores.
  # @!attribute [rw] rank_signals
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals]
  #     Optional. A set of ranking signals associated with the result.
  class SearchResult
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A set of ranking signals.
    # @!attribute [rw] keyword_similarity_score
    #   @return [::Float]
    #     Optional. Keyword matching adjustment.
    # @!attribute [rw] relevance_score
    #   @return [::Float]
    #     Optional. Semantic relevance adjustment.
    # @!attribute [rw] semantic_similarity_score
    #   @return [::Float]
    #     Optional. Semantic similarity adjustment.
    # @!attribute [rw] pctr_rank
    #   @return [::Float]
    #     Optional. Predicted conversion rate adjustment as a rank.
    # @!attribute [rw] topicality_rank
    #   @return [::Float]
    #     Optional. Topicality adjustment as a rank.
    # @!attribute [rw] document_age
    #   @return [::Float]
    #     Optional. Age of the document in hours.
    # @!attribute [rw] boosting_factor
    #   @return [::Float]
    #     Optional. Combined custom boosts for a doc.
    # @!attribute [rw] default_rank
    #   @return [::Float]
    #     Optional. The default rank of the result.
    # @!attribute [rw] custom_signals
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals::CustomSignal>]
    #     Optional. A list of custom clearbox signals.
    class RankSignals
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Custom clearbox signal represented by name and value pair.
      # @!attribute [rw] name
      #   @return [::String]
      #     Optional. Name of the signal.
      # @!attribute [rw] value
      #   @return [::Float]
      #     Optional. Float value representing the ranking signal (e.g. 1.25 for
      #     BM25).
      class CustomSignal
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # @!attribute [rw] key
    #   @return [::String]
    # @!attribute [rw] value
    #   @return [::Google::Cloud::DiscoveryEngine::V1::DoubleList]
    class ModelScoresEntry
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # A facet result.
  # @!attribute [rw] key
  #   @return [::String]
  #     The key for this facet. For example, `"colors"` or `"price"`. It matches
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#key SearchRequest.FacetSpec.FacetKey.key}.
  # @!attribute [rw] values
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Facet::FacetValue>]
  #     The facet values for this field.
  # @!attribute [rw] dynamic_facet
  #   @return [::Boolean]
  #     Whether the facet is dynamically generated.
  class Facet
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A facet value which contains value names and their count.
    # @!attribute [rw] value
    #   @return [::String]
    #     Text value of a facet, such as "Black" for facet "colors".
    #
    #     Note: The following fields are mutually exclusive: `value`, `interval`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] interval
    #   @return [::Google::Cloud::DiscoveryEngine::V1::Interval]
    #     Interval value for a facet, such as [10, 20) for facet "price". It
    #     matches
    #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#intervals SearchRequest.FacetSpec.FacetKey.intervals}.
    #
    #     Note: The following fields are mutually exclusive: `interval`, `value`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] count
    #   @return [::Integer]
    #     Number of items that have this facet value.
    class FacetValue
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # Summary of the top N search results specified by the summary spec.
  # @!attribute [rw] summary_text
  #   @return [::String]
  #     The summary content.
  # @!attribute [rw] summary_skipped_reasons
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummarySkippedReason>]
  #     Additional summary-skipped reasons. This provides the reason for ignored
  #     cases. If nothing is skipped, this field is not set.
  # @!attribute [rw] safety_attributes
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SafetyAttributes]
  #     A collection of Safety Attribute categories and their associated
  #     confidence scores.
  # @!attribute [rw] summary_with_metadata
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummaryWithMetadata]
  #     Summary with metadata information.
  class Summary
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # Safety Attribute categories and their associated confidence scores.
    # @!attribute [rw] categories
    #   @return [::Array<::String>]
    #     The display names of Safety Attribute categories associated with the
    #     generated content. Order matches the Scores.
    # @!attribute [rw] scores
    #   @return [::Array<::Float>]
    #     The confidence scores of the each category, higher
    #     value means higher confidence. Order matches the Categories.
    class SafetyAttributes
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation metadata.
    # @!attribute [rw] citations
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Citation>]
    #     Citations for segments.
    class CitationMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation info for a segment.
    # @!attribute [rw] start_index
    #   @return [::Integer]
    #     Index indicates the start of the segment, measured in bytes/unicode.
    # @!attribute [rw] end_index
    #   @return [::Integer]
    #     End of the attributed segment, exclusive.
    # @!attribute [rw] sources
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationSource>]
    #     Citation sources for the attributed segment.
    class Citation
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation source.
    # @!attribute [rw] reference_index
    #   @return [::Integer]
    #     Document reference index from SummaryWithMetadata.references.
    #     It is 0-indexed and the value will be zero if the reference_index is
    #     not set explicitly.
    class CitationSource
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Document reference.
    # @!attribute [rw] title
    #   @return [::String]
    #     Title of the document.
    # @!attribute [rw] document
    #   @return [::String]
    #     Required.
    #     {::Google::Cloud::DiscoveryEngine::V1::Document#name Document.name} of the
    #     document. Full resource name of the referenced document, in the format
    #     `projects/*/locations/*/collections/*/dataStores/*/branches/*/documents/*`.
    # @!attribute [rw] uri
    #   @return [::String]
    #     Cloud Storage or HTTP uri for the document.
    # @!attribute [rw] chunk_contents
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference::ChunkContent>]
    #     List of cited chunk contents derived from document content.
    class Reference
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Chunk content.
      # @!attribute [rw] content
      #   @return [::String]
      #     Chunk textual content.
      # @!attribute [rw] page_identifier
      #   @return [::String]
      #     Page identifier.
      class ChunkContent
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # Summary with metadata information.
    # @!attribute [rw] summary
    #   @return [::String]
    #     Summary text with no citation information.
    # @!attribute [rw] citation_metadata
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationMetadata]
    #     Citation metadata for given summary.
    # @!attribute [rw] references
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference>]
    #     Document References.
    class SummaryWithMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # An Enum for summary-skipped reasons.
    module SummarySkippedReason
      # Default value. The summary skipped reason is not specified.
      SUMMARY_SKIPPED_REASON_UNSPECIFIED = 0

      # The adversarial query ignored case.
      #
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_adversarial_query SummarySpec.ignore_adversarial_query}
      # is set to `true`.
      ADVERSARIAL_QUERY_IGNORED = 1

      # The non-summary seeking query ignored case.
      #
      # Google skips the summary if the query is chit chat.
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_non_summary_seeking_query SummarySpec.ignore_non_summary_seeking_query}
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED = 2

      # The out-of-domain query ignored case.
      #
      # Google skips the summary if there are no high-relevance search results.
      # For example, the data store contains facts about company A but the
      # user query is asking questions about company B.
      OUT_OF_DOMAIN_QUERY_IGNORED = 3

      # The potential policy violation case.
      #
      # Google skips the summary if there is a potential policy violation
      # detected. This includes content that may be violent or toxic.
      POTENTIAL_POLICY_VIOLATION = 4

      # The LLM addon not enabled case.
      #
      # Google skips the summary if the LLM addon is not enabled.
      LLM_ADDON_NOT_ENABLED = 5

      # The no relevant content case.
      #
      # Google skips the summary if there is no relevant content in the
      # retrieved search results.
      NO_RELEVANT_CONTENT = 6

      # The jail-breaking query ignored case.
      #
      # For example, "Reply in the tone of a competing company's CEO".
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_jail_breaking_query]
      # is set to `true`.
      JAIL_BREAKING_QUERY_IGNORED = 7

      # The customer policy violation case.
      #
      # Google skips the summary if there is a customer policy violation
      # detected. The policy is defined by the customer.
      CUSTOMER_POLICY_VIOLATION = 8

      # The non-answer seeking query ignored case.
      #
      # Google skips the summary if the query doesn't have clear intent.
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_non_answer_seeking_query]
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED_V2 = 9

      # The time out case.
      #
      # Google skips the summary if the time out.
      TIME_OUT = 10
    end
  end

  # Information describing query expansion including whether expansion has
  # occurred.
  # @!attribute [rw] expanded_query
  #   @return [::Boolean]
  #     Bool describing whether query expansion has occurred.
  # @!attribute [rw] pinned_result_count
  #   @return [::Integer]
  #     Number of pinned results. This field will only be set when expansion
  #     happens and
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::QueryExpansionSpec#pin_unexpanded_results SearchRequest.QueryExpansionSpec.pin_unexpanded_results}
  #     is set to true.
  class QueryExpansionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Information describing what natural language understanding was
  # done on the input query.
  # @!attribute [rw] extracted_filters
  #   @return [::String]
  #     The filters that were extracted from the input query.
  # @!attribute [rw] rewritten_query
  #   @return [::String]
  #     Rewritten input query minus the extracted filters.
  # @!attribute [rw] classified_intents
  #   @return [::Array<::String>]
  #     The classified intents from the input query.
  # @!attribute [rw] structured_extracted_filter
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter]
  #     The filters that were extracted from the input query represented in a
  #     structured form.
  class NaturalLanguageQueryUnderstandingInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # The filters that were extracted from the input query represented in a
    # structured form.
    # @!attribute [rw] expression
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression]
    #     The expression denoting the filter that was extracted from the input
    #     query in a structured form. It can be a simple expression denoting a
    #     single string, numerical or geolocation constraint or a compound
    #     expression which is a combination of multiple expressions connected
    #     using logical (OR and AND) operators.
    class StructuredExtractedFilter
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Constraint expression of a string field.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the string field as defined in the schema.
      # @!attribute [rw] values
      #   @return [::Array<::String>]
      #     Values of the string field. The record will only be returned if the
      #     field value matches one of the values specified here.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class StringConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Constraint expression of a number field. Example: price < 100.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the numerical field as defined in the schema.
      # @!attribute [rw] comparison
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint::Comparison]
      #     The comparison operation performed between the field value and the
      #     value specified in the constraint.
      # @!attribute [rw] value
      #   @return [::Float]
      #     The value specified in the numerical constraint.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class NumberConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods

        # The comparison operation that was performed.
        module Comparison
          # Undefined comparison operator.
          COMPARISON_UNSPECIFIED = 0

          # Denotes equality `=` operator.
          EQUALS = 1

          # Denotes less than or equal to `<=` operator.
          LESS_THAN_EQUALS = 2

          # Denotes less than `<` operator.
          LESS_THAN = 3

          # Denotes greater than or equal to `>=` operator.
          GREATER_THAN_EQUALS = 4

          # Denotes greater than `>` operator.
          GREATER_THAN = 5
        end
      end

      # Constraint of a geolocation field.
      # Name of the geolocation field as defined in the schema.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     The name of the geolocation field as defined in the schema.
      # @!attribute [rw] address
      #   @return [::String]
      #     The reference address that was inferred from the input query. The
      #     proximity of the reference address to the geolocation field will be
      #     used to filter the results.
      # @!attribute [rw] latitude
      #   @return [::Float]
      #     The latitude of the geolocation inferred from the input query.
      # @!attribute [rw] longitude
      #   @return [::Float]
      #     The longitude of the geolocation inferred from the input query.
      # @!attribute [rw] radius_in_meters
      #   @return [::Float]
      #     The radius in meters around the address. The record is returned if
      #     the location of the geolocation field is within the radius.
      class GeolocationConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `And` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ANDed together.
      class AndExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `Or` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ORed together.
      class OrExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # The expression denoting the filter that was extracted from the input
      # query.
      # @!attribute [rw] string_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::StringConstraint]
      #     String constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] number_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint]
      #     Numerical constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `number_constraint`, `string_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] geolocation_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::GeolocationConstraint]
      #     Geolocation constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `geolocation_constraint`, `string_constraint`, `number_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] and_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::AndExpression]
      #     Logical "And" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `and_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] or_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::OrExpression]
      #     Logical "Or" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `or_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      class Expression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end
  end

  # Information about the session.
  # @!attribute [rw] name
  #   @return [::String]
  #     Name of the session.
  #     If the auto-session mode is used (when
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest#session SearchRequest.session}
  #     ends with "-"), this field holds the newly generated session name.
  # @!attribute [rw] query_id
  #   @return [::String]
  #     Query ID that corresponds to this search API call.
  #     One session can have multiple turns, each with a unique query ID.
  #
  #     By specifying the session name and this query ID in the Answer API call,
  #     the answer generation happens in the context of the search results from
  #     this search call.
  class SessionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Semantic state of the search response.
  module SemanticState
    # Default value. Should not be used.
    SEMANTIC_STATE_UNSPECIFIED = 0

    # Semantic search was disabled for this search response.
    DISABLED = 1

    # Semantic search was enabled for this search response.
    ENABLED = 2
  end
end

#summary ⇒ ::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary

Returns A summary as part of the search results. This field is only returned if SearchRequest.ContentSearchSpec.summary_spec is set.

Returns:

• (::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary) —

  A summary as part of the search results. This field is only returned if SearchRequest.ContentSearchSpec.summary_spec is set.

# File 'proto_docs/google/cloud/discoveryengine/v1/search_service.rb', line 1419

class SearchResponse
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # Represents the search results.
  # @!attribute [rw] id
  #   @return [::String]
  #     {::Google::Cloud::DiscoveryEngine::V1::Document#id Document.id} of the
  #     searched {::Google::Cloud::DiscoveryEngine::V1::Document Document}.
  # @!attribute [rw] document
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Document]
  #     The document data snippet in the search response. Only fields that are
  #     marked as `retrievable` are populated.
  # @!attribute [rw] chunk
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Chunk]
  #     The chunk data in the search response if the
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec#search_result_mode SearchRequest.ContentSearchSpec.search_result_mode}
  #     is set to
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SearchResultMode::CHUNKS CHUNKS}.
  # @!attribute [r] model_scores
  #   @return [::Google::Protobuf::Map{::String => ::Google::Cloud::DiscoveryEngine::V1::DoubleList}]
  #     Output only. Google provided available scores.
  # @!attribute [rw] rank_signals
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals]
  #     Optional. A set of ranking signals associated with the result.
  class SearchResult
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A set of ranking signals.
    # @!attribute [rw] keyword_similarity_score
    #   @return [::Float]
    #     Optional. Keyword matching adjustment.
    # @!attribute [rw] relevance_score
    #   @return [::Float]
    #     Optional. Semantic relevance adjustment.
    # @!attribute [rw] semantic_similarity_score
    #   @return [::Float]
    #     Optional. Semantic similarity adjustment.
    # @!attribute [rw] pctr_rank
    #   @return [::Float]
    #     Optional. Predicted conversion rate adjustment as a rank.
    # @!attribute [rw] topicality_rank
    #   @return [::Float]
    #     Optional. Topicality adjustment as a rank.
    # @!attribute [rw] document_age
    #   @return [::Float]
    #     Optional. Age of the document in hours.
    # @!attribute [rw] boosting_factor
    #   @return [::Float]
    #     Optional. Combined custom boosts for a doc.
    # @!attribute [rw] default_rank
    #   @return [::Float]
    #     Optional. The default rank of the result.
    # @!attribute [rw] custom_signals
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals::CustomSignal>]
    #     Optional. A list of custom clearbox signals.
    class RankSignals
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Custom clearbox signal represented by name and value pair.
      # @!attribute [rw] name
      #   @return [::String]
      #     Optional. Name of the signal.
      # @!attribute [rw] value
      #   @return [::Float]
      #     Optional. Float value representing the ranking signal (e.g. 1.25 for
      #     BM25).
      class CustomSignal
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # @!attribute [rw] key
    #   @return [::String]
    # @!attribute [rw] value
    #   @return [::Google::Cloud::DiscoveryEngine::V1::DoubleList]
    class ModelScoresEntry
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # A facet result.
  # @!attribute [rw] key
  #   @return [::String]
  #     The key for this facet. For example, `"colors"` or `"price"`. It matches
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#key SearchRequest.FacetSpec.FacetKey.key}.
  # @!attribute [rw] values
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Facet::FacetValue>]
  #     The facet values for this field.
  # @!attribute [rw] dynamic_facet
  #   @return [::Boolean]
  #     Whether the facet is dynamically generated.
  class Facet
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A facet value which contains value names and their count.
    # @!attribute [rw] value
    #   @return [::String]
    #     Text value of a facet, such as "Black" for facet "colors".
    #
    #     Note: The following fields are mutually exclusive: `value`, `interval`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] interval
    #   @return [::Google::Cloud::DiscoveryEngine::V1::Interval]
    #     Interval value for a facet, such as [10, 20) for facet "price". It
    #     matches
    #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#intervals SearchRequest.FacetSpec.FacetKey.intervals}.
    #
    #     Note: The following fields are mutually exclusive: `interval`, `value`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] count
    #   @return [::Integer]
    #     Number of items that have this facet value.
    class FacetValue
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # Summary of the top N search results specified by the summary spec.
  # @!attribute [rw] summary_text
  #   @return [::String]
  #     The summary content.
  # @!attribute [rw] summary_skipped_reasons
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummarySkippedReason>]
  #     Additional summary-skipped reasons. This provides the reason for ignored
  #     cases. If nothing is skipped, this field is not set.
  # @!attribute [rw] safety_attributes
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SafetyAttributes]
  #     A collection of Safety Attribute categories and their associated
  #     confidence scores.
  # @!attribute [rw] summary_with_metadata
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummaryWithMetadata]
  #     Summary with metadata information.
  class Summary
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # Safety Attribute categories and their associated confidence scores.
    # @!attribute [rw] categories
    #   @return [::Array<::String>]
    #     The display names of Safety Attribute categories associated with the
    #     generated content. Order matches the Scores.
    # @!attribute [rw] scores
    #   @return [::Array<::Float>]
    #     The confidence scores of the each category, higher
    #     value means higher confidence. Order matches the Categories.
    class SafetyAttributes
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation metadata.
    # @!attribute [rw] citations
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Citation>]
    #     Citations for segments.
    class CitationMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation info for a segment.
    # @!attribute [rw] start_index
    #   @return [::Integer]
    #     Index indicates the start of the segment, measured in bytes/unicode.
    # @!attribute [rw] end_index
    #   @return [::Integer]
    #     End of the attributed segment, exclusive.
    # @!attribute [rw] sources
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationSource>]
    #     Citation sources for the attributed segment.
    class Citation
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation source.
    # @!attribute [rw] reference_index
    #   @return [::Integer]
    #     Document reference index from SummaryWithMetadata.references.
    #     It is 0-indexed and the value will be zero if the reference_index is
    #     not set explicitly.
    class CitationSource
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Document reference.
    # @!attribute [rw] title
    #   @return [::String]
    #     Title of the document.
    # @!attribute [rw] document
    #   @return [::String]
    #     Required.
    #     {::Google::Cloud::DiscoveryEngine::V1::Document#name Document.name} of the
    #     document. Full resource name of the referenced document, in the format
    #     `projects/*/locations/*/collections/*/dataStores/*/branches/*/documents/*`.
    # @!attribute [rw] uri
    #   @return [::String]
    #     Cloud Storage or HTTP uri for the document.
    # @!attribute [rw] chunk_contents
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference::ChunkContent>]
    #     List of cited chunk contents derived from document content.
    class Reference
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Chunk content.
      # @!attribute [rw] content
      #   @return [::String]
      #     Chunk textual content.
      # @!attribute [rw] page_identifier
      #   @return [::String]
      #     Page identifier.
      class ChunkContent
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # Summary with metadata information.
    # @!attribute [rw] summary
    #   @return [::String]
    #     Summary text with no citation information.
    # @!attribute [rw] citation_metadata
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationMetadata]
    #     Citation metadata for given summary.
    # @!attribute [rw] references
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference>]
    #     Document References.
    class SummaryWithMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # An Enum for summary-skipped reasons.
    module SummarySkippedReason
      # Default value. The summary skipped reason is not specified.
      SUMMARY_SKIPPED_REASON_UNSPECIFIED = 0

      # The adversarial query ignored case.
      #
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_adversarial_query SummarySpec.ignore_adversarial_query}
      # is set to `true`.
      ADVERSARIAL_QUERY_IGNORED = 1

      # The non-summary seeking query ignored case.
      #
      # Google skips the summary if the query is chit chat.
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_non_summary_seeking_query SummarySpec.ignore_non_summary_seeking_query}
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED = 2

      # The out-of-domain query ignored case.
      #
      # Google skips the summary if there are no high-relevance search results.
      # For example, the data store contains facts about company A but the
      # user query is asking questions about company B.
      OUT_OF_DOMAIN_QUERY_IGNORED = 3

      # The potential policy violation case.
      #
      # Google skips the summary if there is a potential policy violation
      # detected. This includes content that may be violent or toxic.
      POTENTIAL_POLICY_VIOLATION = 4

      # The LLM addon not enabled case.
      #
      # Google skips the summary if the LLM addon is not enabled.
      LLM_ADDON_NOT_ENABLED = 5

      # The no relevant content case.
      #
      # Google skips the summary if there is no relevant content in the
      # retrieved search results.
      NO_RELEVANT_CONTENT = 6

      # The jail-breaking query ignored case.
      #
      # For example, "Reply in the tone of a competing company's CEO".
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_jail_breaking_query]
      # is set to `true`.
      JAIL_BREAKING_QUERY_IGNORED = 7

      # The customer policy violation case.
      #
      # Google skips the summary if there is a customer policy violation
      # detected. The policy is defined by the customer.
      CUSTOMER_POLICY_VIOLATION = 8

      # The non-answer seeking query ignored case.
      #
      # Google skips the summary if the query doesn't have clear intent.
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_non_answer_seeking_query]
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED_V2 = 9

      # The time out case.
      #
      # Google skips the summary if the time out.
      TIME_OUT = 10
    end
  end

  # Information describing query expansion including whether expansion has
  # occurred.
  # @!attribute [rw] expanded_query
  #   @return [::Boolean]
  #     Bool describing whether query expansion has occurred.
  # @!attribute [rw] pinned_result_count
  #   @return [::Integer]
  #     Number of pinned results. This field will only be set when expansion
  #     happens and
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::QueryExpansionSpec#pin_unexpanded_results SearchRequest.QueryExpansionSpec.pin_unexpanded_results}
  #     is set to true.
  class QueryExpansionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Information describing what natural language understanding was
  # done on the input query.
  # @!attribute [rw] extracted_filters
  #   @return [::String]
  #     The filters that were extracted from the input query.
  # @!attribute [rw] rewritten_query
  #   @return [::String]
  #     Rewritten input query minus the extracted filters.
  # @!attribute [rw] classified_intents
  #   @return [::Array<::String>]
  #     The classified intents from the input query.
  # @!attribute [rw] structured_extracted_filter
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter]
  #     The filters that were extracted from the input query represented in a
  #     structured form.
  class NaturalLanguageQueryUnderstandingInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # The filters that were extracted from the input query represented in a
    # structured form.
    # @!attribute [rw] expression
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression]
    #     The expression denoting the filter that was extracted from the input
    #     query in a structured form. It can be a simple expression denoting a
    #     single string, numerical or geolocation constraint or a compound
    #     expression which is a combination of multiple expressions connected
    #     using logical (OR and AND) operators.
    class StructuredExtractedFilter
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Constraint expression of a string field.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the string field as defined in the schema.
      # @!attribute [rw] values
      #   @return [::Array<::String>]
      #     Values of the string field. The record will only be returned if the
      #     field value matches one of the values specified here.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class StringConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Constraint expression of a number field. Example: price < 100.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the numerical field as defined in the schema.
      # @!attribute [rw] comparison
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint::Comparison]
      #     The comparison operation performed between the field value and the
      #     value specified in the constraint.
      # @!attribute [rw] value
      #   @return [::Float]
      #     The value specified in the numerical constraint.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class NumberConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods

        # The comparison operation that was performed.
        module Comparison
          # Undefined comparison operator.
          COMPARISON_UNSPECIFIED = 0

          # Denotes equality `=` operator.
          EQUALS = 1

          # Denotes less than or equal to `<=` operator.
          LESS_THAN_EQUALS = 2

          # Denotes less than `<` operator.
          LESS_THAN = 3

          # Denotes greater than or equal to `>=` operator.
          GREATER_THAN_EQUALS = 4

          # Denotes greater than `>` operator.
          GREATER_THAN = 5
        end
      end

      # Constraint of a geolocation field.
      # Name of the geolocation field as defined in the schema.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     The name of the geolocation field as defined in the schema.
      # @!attribute [rw] address
      #   @return [::String]
      #     The reference address that was inferred from the input query. The
      #     proximity of the reference address to the geolocation field will be
      #     used to filter the results.
      # @!attribute [rw] latitude
      #   @return [::Float]
      #     The latitude of the geolocation inferred from the input query.
      # @!attribute [rw] longitude
      #   @return [::Float]
      #     The longitude of the geolocation inferred from the input query.
      # @!attribute [rw] radius_in_meters
      #   @return [::Float]
      #     The radius in meters around the address. The record is returned if
      #     the location of the geolocation field is within the radius.
      class GeolocationConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `And` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ANDed together.
      class AndExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `Or` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ORed together.
      class OrExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # The expression denoting the filter that was extracted from the input
      # query.
      # @!attribute [rw] string_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::StringConstraint]
      #     String constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] number_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint]
      #     Numerical constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `number_constraint`, `string_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] geolocation_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::GeolocationConstraint]
      #     Geolocation constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `geolocation_constraint`, `string_constraint`, `number_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] and_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::AndExpression]
      #     Logical "And" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `and_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] or_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::OrExpression]
      #     Logical "Or" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `or_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      class Expression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end
  end

  # Information about the session.
  # @!attribute [rw] name
  #   @return [::String]
  #     Name of the session.
  #     If the auto-session mode is used (when
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest#session SearchRequest.session}
  #     ends with "-"), this field holds the newly generated session name.
  # @!attribute [rw] query_id
  #   @return [::String]
  #     Query ID that corresponds to this search API call.
  #     One session can have multiple turns, each with a unique query ID.
  #
  #     By specifying the session name and this query ID in the Answer API call,
  #     the answer generation happens in the context of the search results from
  #     this search call.
  class SessionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Semantic state of the search response.
  module SemanticState
    # Default value. Should not be used.
    SEMANTIC_STATE_UNSPECIFIED = 0

    # Semantic search was disabled for this search response.
    DISABLED = 1

    # Semantic search was enabled for this search response.
    ENABLED = 2
  end
end

#total_size ⇒ ::Integer

The estimated total count of matched items irrespective of pagination. The count of results returned by pagination may be less than the total_size that matches.

Returns:

• (::Integer) —

  The estimated total count of matched items irrespective of pagination. The count of results returned by pagination may be less than the total_size that matches.

# File 'proto_docs/google/cloud/discoveryengine/v1/search_service.rb', line 1419

class SearchResponse
  include ::Google::Protobuf::MessageExts
  extend ::Google::Protobuf::MessageExts::ClassMethods

  # Represents the search results.
  # @!attribute [rw] id
  #   @return [::String]
  #     {::Google::Cloud::DiscoveryEngine::V1::Document#id Document.id} of the
  #     searched {::Google::Cloud::DiscoveryEngine::V1::Document Document}.
  # @!attribute [rw] document
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Document]
  #     The document data snippet in the search response. Only fields that are
  #     marked as `retrievable` are populated.
  # @!attribute [rw] chunk
  #   @return [::Google::Cloud::DiscoveryEngine::V1::Chunk]
  #     The chunk data in the search response if the
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec#search_result_mode SearchRequest.ContentSearchSpec.search_result_mode}
  #     is set to
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SearchResultMode::CHUNKS CHUNKS}.
  # @!attribute [r] model_scores
  #   @return [::Google::Protobuf::Map{::String => ::Google::Cloud::DiscoveryEngine::V1::DoubleList}]
  #     Output only. Google provided available scores.
  # @!attribute [rw] rank_signals
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals]
  #     Optional. A set of ranking signals associated with the result.
  class SearchResult
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A set of ranking signals.
    # @!attribute [rw] keyword_similarity_score
    #   @return [::Float]
    #     Optional. Keyword matching adjustment.
    # @!attribute [rw] relevance_score
    #   @return [::Float]
    #     Optional. Semantic relevance adjustment.
    # @!attribute [rw] semantic_similarity_score
    #   @return [::Float]
    #     Optional. Semantic similarity adjustment.
    # @!attribute [rw] pctr_rank
    #   @return [::Float]
    #     Optional. Predicted conversion rate adjustment as a rank.
    # @!attribute [rw] topicality_rank
    #   @return [::Float]
    #     Optional. Topicality adjustment as a rank.
    # @!attribute [rw] document_age
    #   @return [::Float]
    #     Optional. Age of the document in hours.
    # @!attribute [rw] boosting_factor
    #   @return [::Float]
    #     Optional. Combined custom boosts for a doc.
    # @!attribute [rw] default_rank
    #   @return [::Float]
    #     Optional. The default rank of the result.
    # @!attribute [rw] custom_signals
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::SearchResult::RankSignals::CustomSignal>]
    #     Optional. A list of custom clearbox signals.
    class RankSignals
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Custom clearbox signal represented by name and value pair.
      # @!attribute [rw] name
      #   @return [::String]
      #     Optional. Name of the signal.
      # @!attribute [rw] value
      #   @return [::Float]
      #     Optional. Float value representing the ranking signal (e.g. 1.25 for
      #     BM25).
      class CustomSignal
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # @!attribute [rw] key
    #   @return [::String]
    # @!attribute [rw] value
    #   @return [::Google::Cloud::DiscoveryEngine::V1::DoubleList]
    class ModelScoresEntry
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # A facet result.
  # @!attribute [rw] key
  #   @return [::String]
  #     The key for this facet. For example, `"colors"` or `"price"`. It matches
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#key SearchRequest.FacetSpec.FacetKey.key}.
  # @!attribute [rw] values
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Facet::FacetValue>]
  #     The facet values for this field.
  # @!attribute [rw] dynamic_facet
  #   @return [::Boolean]
  #     Whether the facet is dynamically generated.
  class Facet
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # A facet value which contains value names and their count.
    # @!attribute [rw] value
    #   @return [::String]
    #     Text value of a facet, such as "Black" for facet "colors".
    #
    #     Note: The following fields are mutually exclusive: `value`, `interval`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] interval
    #   @return [::Google::Cloud::DiscoveryEngine::V1::Interval]
    #     Interval value for a facet, such as [10, 20) for facet "price". It
    #     matches
    #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::FacetSpec::FacetKey#intervals SearchRequest.FacetSpec.FacetKey.intervals}.
    #
    #     Note: The following fields are mutually exclusive: `interval`, `value`. If a field in that set is populated, all other fields in the set will automatically be cleared.
    # @!attribute [rw] count
    #   @return [::Integer]
    #     Number of items that have this facet value.
    class FacetValue
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end
  end

  # Summary of the top N search results specified by the summary spec.
  # @!attribute [rw] summary_text
  #   @return [::String]
  #     The summary content.
  # @!attribute [rw] summary_skipped_reasons
  #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummarySkippedReason>]
  #     Additional summary-skipped reasons. This provides the reason for ignored
  #     cases. If nothing is skipped, this field is not set.
  # @!attribute [rw] safety_attributes
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SafetyAttributes]
  #     A collection of Safety Attribute categories and their associated
  #     confidence scores.
  # @!attribute [rw] summary_with_metadata
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::SummaryWithMetadata]
  #     Summary with metadata information.
  class Summary
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # Safety Attribute categories and their associated confidence scores.
    # @!attribute [rw] categories
    #   @return [::Array<::String>]
    #     The display names of Safety Attribute categories associated with the
    #     generated content. Order matches the Scores.
    # @!attribute [rw] scores
    #   @return [::Array<::Float>]
    #     The confidence scores of the each category, higher
    #     value means higher confidence. Order matches the Categories.
    class SafetyAttributes
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation metadata.
    # @!attribute [rw] citations
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Citation>]
    #     Citations for segments.
    class CitationMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation info for a segment.
    # @!attribute [rw] start_index
    #   @return [::Integer]
    #     Index indicates the start of the segment, measured in bytes/unicode.
    # @!attribute [rw] end_index
    #   @return [::Integer]
    #     End of the attributed segment, exclusive.
    # @!attribute [rw] sources
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationSource>]
    #     Citation sources for the attributed segment.
    class Citation
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Citation source.
    # @!attribute [rw] reference_index
    #   @return [::Integer]
    #     Document reference index from SummaryWithMetadata.references.
    #     It is 0-indexed and the value will be zero if the reference_index is
    #     not set explicitly.
    class CitationSource
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # Document reference.
    # @!attribute [rw] title
    #   @return [::String]
    #     Title of the document.
    # @!attribute [rw] document
    #   @return [::String]
    #     Required.
    #     {::Google::Cloud::DiscoveryEngine::V1::Document#name Document.name} of the
    #     document. Full resource name of the referenced document, in the format
    #     `projects/*/locations/*/collections/*/dataStores/*/branches/*/documents/*`.
    # @!attribute [rw] uri
    #   @return [::String]
    #     Cloud Storage or HTTP uri for the document.
    # @!attribute [rw] chunk_contents
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference::ChunkContent>]
    #     List of cited chunk contents derived from document content.
    class Reference
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Chunk content.
      # @!attribute [rw] content
      #   @return [::String]
      #     Chunk textual content.
      # @!attribute [rw] page_identifier
      #   @return [::String]
      #     Page identifier.
      class ChunkContent
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end

    # Summary with metadata information.
    # @!attribute [rw] summary
    #   @return [::String]
    #     Summary text with no citation information.
    # @!attribute [rw] citation_metadata
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::CitationMetadata]
    #     Citation metadata for given summary.
    # @!attribute [rw] references
    #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::Summary::Reference>]
    #     Document References.
    class SummaryWithMetadata
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods
    end

    # An Enum for summary-skipped reasons.
    module SummarySkippedReason
      # Default value. The summary skipped reason is not specified.
      SUMMARY_SKIPPED_REASON_UNSPECIFIED = 0

      # The adversarial query ignored case.
      #
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_adversarial_query SummarySpec.ignore_adversarial_query}
      # is set to `true`.
      ADVERSARIAL_QUERY_IGNORED = 1

      # The non-summary seeking query ignored case.
      #
      # Google skips the summary if the query is chit chat.
      # Only used when
      # {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::ContentSearchSpec::SummarySpec#ignore_non_summary_seeking_query SummarySpec.ignore_non_summary_seeking_query}
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED = 2

      # The out-of-domain query ignored case.
      #
      # Google skips the summary if there are no high-relevance search results.
      # For example, the data store contains facts about company A but the
      # user query is asking questions about company B.
      OUT_OF_DOMAIN_QUERY_IGNORED = 3

      # The potential policy violation case.
      #
      # Google skips the summary if there is a potential policy violation
      # detected. This includes content that may be violent or toxic.
      POTENTIAL_POLICY_VIOLATION = 4

      # The LLM addon not enabled case.
      #
      # Google skips the summary if the LLM addon is not enabled.
      LLM_ADDON_NOT_ENABLED = 5

      # The no relevant content case.
      #
      # Google skips the summary if there is no relevant content in the
      # retrieved search results.
      NO_RELEVANT_CONTENT = 6

      # The jail-breaking query ignored case.
      #
      # For example, "Reply in the tone of a competing company's CEO".
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_jail_breaking_query]
      # is set to `true`.
      JAIL_BREAKING_QUERY_IGNORED = 7

      # The customer policy violation case.
      #
      # Google skips the summary if there is a customer policy violation
      # detected. The policy is defined by the customer.
      CUSTOMER_POLICY_VIOLATION = 8

      # The non-answer seeking query ignored case.
      #
      # Google skips the summary if the query doesn't have clear intent.
      # Only used when
      # [SearchRequest.ContentSearchSpec.SummarySpec.ignore_non_answer_seeking_query]
      # is set to `true`.
      NON_SUMMARY_SEEKING_QUERY_IGNORED_V2 = 9

      # The time out case.
      #
      # Google skips the summary if the time out.
      TIME_OUT = 10
    end
  end

  # Information describing query expansion including whether expansion has
  # occurred.
  # @!attribute [rw] expanded_query
  #   @return [::Boolean]
  #     Bool describing whether query expansion has occurred.
  # @!attribute [rw] pinned_result_count
  #   @return [::Integer]
  #     Number of pinned results. This field will only be set when expansion
  #     happens and
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest::QueryExpansionSpec#pin_unexpanded_results SearchRequest.QueryExpansionSpec.pin_unexpanded_results}
  #     is set to true.
  class QueryExpansionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Information describing what natural language understanding was
  # done on the input query.
  # @!attribute [rw] extracted_filters
  #   @return [::String]
  #     The filters that were extracted from the input query.
  # @!attribute [rw] rewritten_query
  #   @return [::String]
  #     Rewritten input query minus the extracted filters.
  # @!attribute [rw] classified_intents
  #   @return [::Array<::String>]
  #     The classified intents from the input query.
  # @!attribute [rw] structured_extracted_filter
  #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter]
  #     The filters that were extracted from the input query represented in a
  #     structured form.
  class NaturalLanguageQueryUnderstandingInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods

    # The filters that were extracted from the input query represented in a
    # structured form.
    # @!attribute [rw] expression
    #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression]
    #     The expression denoting the filter that was extracted from the input
    #     query in a structured form. It can be a simple expression denoting a
    #     single string, numerical or geolocation constraint or a compound
    #     expression which is a combination of multiple expressions connected
    #     using logical (OR and AND) operators.
    class StructuredExtractedFilter
      include ::Google::Protobuf::MessageExts
      extend ::Google::Protobuf::MessageExts::ClassMethods

      # Constraint expression of a string field.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the string field as defined in the schema.
      # @!attribute [rw] values
      #   @return [::Array<::String>]
      #     Values of the string field. The record will only be returned if the
      #     field value matches one of the values specified here.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class StringConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Constraint expression of a number field. Example: price < 100.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     Name of the numerical field as defined in the schema.
      # @!attribute [rw] comparison
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint::Comparison]
      #     The comparison operation performed between the field value and the
      #     value specified in the constraint.
      # @!attribute [rw] value
      #   @return [::Float]
      #     The value specified in the numerical constraint.
      # @!attribute [rw] query_segment
      #   @return [::String]
      #     Identifies the keywords within the search query that match a filter.
      class NumberConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods

        # The comparison operation that was performed.
        module Comparison
          # Undefined comparison operator.
          COMPARISON_UNSPECIFIED = 0

          # Denotes equality `=` operator.
          EQUALS = 1

          # Denotes less than or equal to `<=` operator.
          LESS_THAN_EQUALS = 2

          # Denotes less than `<` operator.
          LESS_THAN = 3

          # Denotes greater than or equal to `>=` operator.
          GREATER_THAN_EQUALS = 4

          # Denotes greater than `>` operator.
          GREATER_THAN = 5
        end
      end

      # Constraint of a geolocation field.
      # Name of the geolocation field as defined in the schema.
      # @!attribute [rw] field_name
      #   @return [::String]
      #     The name of the geolocation field as defined in the schema.
      # @!attribute [rw] address
      #   @return [::String]
      #     The reference address that was inferred from the input query. The
      #     proximity of the reference address to the geolocation field will be
      #     used to filter the results.
      # @!attribute [rw] latitude
      #   @return [::Float]
      #     The latitude of the geolocation inferred from the input query.
      # @!attribute [rw] longitude
      #   @return [::Float]
      #     The longitude of the geolocation inferred from the input query.
      # @!attribute [rw] radius_in_meters
      #   @return [::Float]
      #     The radius in meters around the address. The record is returned if
      #     the location of the geolocation field is within the radius.
      class GeolocationConstraint
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `And` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ANDed together.
      class AndExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # Logical `Or` operator.
      # @!attribute [rw] expressions
      #   @return [::Array<::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::Expression>]
      #     The expressions that were ORed together.
      class OrExpression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end

      # The expression denoting the filter that was extracted from the input
      # query.
      # @!attribute [rw] string_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::StringConstraint]
      #     String constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] number_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::NumberConstraint]
      #     Numerical constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `number_constraint`, `string_constraint`, `geolocation_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] geolocation_constraint
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::GeolocationConstraint]
      #     Geolocation constraint expression.
      #
      #     Note: The following fields are mutually exclusive: `geolocation_constraint`, `string_constraint`, `number_constraint`, `and_expr`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] and_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::AndExpression]
      #     Logical "And" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `and_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `or_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      # @!attribute [rw] or_expr
      #   @return [::Google::Cloud::DiscoveryEngine::V1::SearchResponse::NaturalLanguageQueryUnderstandingInfo::StructuredExtractedFilter::OrExpression]
      #     Logical "Or" compound operator connecting multiple expressions.
      #
      #     Note: The following fields are mutually exclusive: `or_expr`, `string_constraint`, `number_constraint`, `geolocation_constraint`, `and_expr`. If a field in that set is populated, all other fields in the set will automatically be cleared.
      class Expression
        include ::Google::Protobuf::MessageExts
        extend ::Google::Protobuf::MessageExts::ClassMethods
      end
    end
  end

  # Information about the session.
  # @!attribute [rw] name
  #   @return [::String]
  #     Name of the session.
  #     If the auto-session mode is used (when
  #     {::Google::Cloud::DiscoveryEngine::V1::SearchRequest#session SearchRequest.session}
  #     ends with "-"), this field holds the newly generated session name.
  # @!attribute [rw] query_id
  #   @return [::String]
  #     Query ID that corresponds to this search API call.
  #     One session can have multiple turns, each with a unique query ID.
  #
  #     By specifying the session name and this query ID in the Answer API call,
  #     the answer generation happens in the context of the search results from
  #     this search call.
  class SessionInfo
    include ::Google::Protobuf::MessageExts
    extend ::Google::Protobuf::MessageExts::ClassMethods
  end

  # Semantic state of the search response.
  module SemanticState
    # Default value. Should not be used.
    SEMANTIC_STATE_UNSPECIFIED = 0

    # Semantic search was disabled for this search response.
    DISABLED = 1

    # Semantic search was enabled for this search response.
    ENABLED = 2
  end
end